The Tow Light Encyclopedia

A complete, plain-language reference covering wireless and wired tow lights — what they are, how they work, how to choose one, how to install and use them, how to keep them working, what the regulations require, and how to recover one if it goes missing. Built around real-world questions from tow operators, RV haulers, mobile home transporters, agricultural equipment movers, flatbed drivers, and everyday vehicle owners across North America.

This Encyclopedia complements our main FAQ, our product manuals, and our warranty page. When a topic has its own dedicated page, we link directly so you can dig deeper.

If you have a question that isn't answered here, contact us — TowBrite is a small Canadian manufacturer based in Ottawa, Ontario, and we genuinely answer the phone.


About TowBrite

Who makes TowBrite tow lights?

TowBrite tow lights are designed and hand-assembled in Ottawa, Ontario, Canada. Parts are sourced from Canada, the USA, and internationally, and every unit is built and tested in our Ottawa facility. We've been making wired and wireless tow lights for tow operators, RV haulers, mobile home transporters, farmers, and transport professionals across North America for years. Our warranty is honoured and serviced in Ottawa.

Why buy TowBrite specifically?

We're a Canadian manufacturer that builds rather than rebrands. Because we make the products ourselves, we can repair them ourselves, customize them to your specific needs, source replacement parts directly, and stand behind every unit with a lifetime limited warranty. We also repair other manufacturers' equipment (including TowMate, Lite-It, and similar products) — so even if you bought from someone else, we may be able to help. See our TowMate / Lite-It repair page.

What's the warranty on a TowBrite tow light?

All TowBrite tow lights come with a lifetime limited warranty. Full coverage details are on our warranty page.

Are TowBrite tow lights certified?

Yes. TowBrite wireless tow lights are certified by both the United States Federal Communications Commission (FCC) and Innovation, Science and Economic Development Canada (formerly Industry Canada / IC). Our FCC ID is 2AWK3-TBR433TX and our IC ID is 26388-TBR433TX. The "433" in the ID refers to the 433 MHz radio band our transmitters operate on — a globally recognized low-power band well suited to vehicle accessories.

Where can I buy TowBrite tow lights?

Directly from us at towbrite.com, or through our network of authorized dealers across Canada and the USA.

Does TowBrite ship internationally?

Yes. Shipping within Canada and the USA is free in most cases (see our shipping page for details). For international orders, we work with you on customs paperwork and can ship via air cargo from Ottawa, Ontario, or via LCL sea freight from Montreal or Toronto ports. Customers in remote locations (Alaska, Yukon, Nunavut, Hawaii, islands) are eligible for heavily discounted shipping — contact us for a quote.  Our tow lights can be found in Australia, New Zealand, Japan, Russia and in other international locations.

Can TowBrite build a custom tow light for me?

Yes — and we'd love to. We manufacture in-house in Ottawa and stock a wide range of components, so we can usually build a custom configuration at roughly the same price as our pre-configured products. Custom designs are particularly common for unusual mounting requirements, oversized loads, fleet standardization, integration with existing equipment, or specific connector/voltage combinations. See our custom designs page, or just contact us and tell us what you need.

The TowBrite Product Line

What products does TowBrite make?

We make wireless tow lights in five standard sizes (6", 8", 22", 36", and 48"), wired tow lights, strobes and light bars for warning use, and our TrailerVolt product line for trailer power applications. We also stock a complete range of accessories, batteries, chargers, connectors, hardware, LED lights, transmitters, housings, receivers, and testing tools, plus a dedicated TowMate-compatible parts collection.

What's the difference between TowBrite Light Duty and Heavy Duty tow lights?

Light Duty tow lights are designed for towing passenger cars, light trucks, and similar vehicles. They typically use rubber-coated magnets, are sized for standard rear panels, and prioritize fast deployment and easy carrying. Heavy Duty tow lights are built for commercial wreckers, flatbeds, mobile home transport, and larger combinations — typically wider (36" or 48"), brighter, more rugged, and often with integrated strobes for warning visibility. Match the unit to the size and weight of vehicles you tow regularly.

What's the TowBrite 6" wireless tow light set?

A pair of small, magnetic-mount lithium tow lights (one for each rear corner of the towed vehicle) for situations where a single full-width bar isn't practical. Common applications include vehicles with significant rear overhang, towed vehicles where you can't get a clear central mounting surface, and operators who want a lighter, more flexible setup. See the 6" set product page.

What's the TowBrite 8" wireless tow light set?

Similar concept to the 6" set — a pair of corner-mounted lithium units — but with a slightly larger housing and more LEDs per side. Good for slightly larger vehicles where the 6" set's visibility is borderline. See the 8" set product page.

What's the TowBrite 22" wireless tow light?

Our most popular Light Duty single-bar wireless tow light. The 22" lithium model is sized for typical passenger cars, light trucks, and small trailers, with strong magnets, integrated brake/tail/turn signaling, and 10+ hours of runtime per charge. See the 22" product page.

What's the TowBrite 36" wireless tow light?

Our flagship single-bar wireless tow light, sized for full-width visibility on most vehicles. The 36" lithium is the standard choice for tow truck operators who want a single bar that handles virtually any job. See the 36" product page. For wreckers and recovery operators, we also offer a 36" with integrated strobes.

What's the TowBrite 48" wireless tow light?

Our largest standard wireless tow light, sized for oversized loads, mobile homes, agricultural implements, and wide commercial vehicles. Available with large strobes for maximum warning visibility, or slim strobes for a lower profile.

What are the Milwaukee and DeWalt battery options?

Some of our 36" wireless tow lights are configured to run on Milwaukee M18 or DeWalt 20V MAX cordless tool batteries instead of an internal lithium pack. If you already own one of these tool platforms, this is an excellent choice — you can swap a fresh pack in seconds rather than waiting for an internal battery to recharge, and you can use the same batteries you use for your other shop and field tools.

What's TrailerVolt?

TrailerVolt is our product line for trailer power applications — solving the problem of providing battery-backed 12V power on a trailer for accessories, lighting, and equipment that can't easily be wired through to the towing vehicle. Common use cases include powering aftermarket trailer brakes, lift gates, equipment, and refrigeration. Contact us to discuss your specific application.

What strobes does TowBrite make?

We offer standalone strobes and light bars for emergency, recovery, and warning applications. Strobes can be ordered as standalone units or integrated directly into our heavy-duty wireless tow lights. For wreckers and recovery operators, integrated strobes consolidate brake/tail/turn and warning functions into a single mounting and a single power source.

Tow Light Basics

What is a wireless tow light?

A wireless tow light is a portable, battery-powered LED light bar that mounts to the rear of a towed vehicle and reproduces its tail, brake, and turn signal functions without any cable running between the towing vehicle and the tow. A small transmitter plugs into your truck's trailer plug and sends signals over radio frequency to the light bar, which lights up in response.

How do TowBrite wireless tow lights work?

A TowBrite system has two main parts: a transmitter that plugs into the towing vehicle's trailer plug, and a battery-powered LED light bar that mounts to the towed vehicle. When you press the brake pedal, signal a turn, or turn on your headlights, the transmitter detects the signal at the trailer plug and broadcasts a corresponding command on the 433 MHz band. The light bar receives the command and illuminates the appropriate LEDs. Because the system is fully wireless between the two vehicles, no cable runs between the truck and the tow.

What's the difference between a wireless and a wired tow light?

A wired tow light uses a physical cable to connect the towed vehicle's lights to the towing vehicle's trailer plug. It's reliable and doesn't need a battery, but the cable must be routed safely along the underside of both vehicles, which takes time on every job and creates a snag hazard. A wireless tow light eliminates the cable entirely — you plug the transmitter into the truck and place the light bar on the back of the towed vehicle. Setup is dramatically faster, but the light bar relies on a charged battery and a working radio link. TowBrite makes both wired and wireless versions to suit either preference.

Are TowBrite wireless tow lights as bright as wired ones?

Yes. Modern LEDs put out the same brake, tail, and turn signal output regardless of how they're powered. Brightness is determined by LED choice and reflector/lens design, not by whether the unit gets its power through a cable or from an internal battery.

How long have wireless tow lights existed?

Battery-powered, magnetically-mounted tow lights have existed in some form since the mid-20th century. Truly wireless versions — where a radio transmitter replaces the cable between truck and trailer — became practical in the early 2000s as low-cost RF chipsets and high-output LEDs became available. Modern units (including TowBrite) are dramatically brighter, longer-lasting, and more reliable than the first wireless generation.

Choosing a TowBrite Tow Light

How do I choose the right TowBrite for my needs?

Start with how you'll use it. High-volume commercial tow operators should look at our heavy-duty 36" or 48" units with lithium batteries and (often) integrated strobes. Light-duty users (RV haulers, occasional towers, hobbyist car movers) are well served by our 22" or 36" Light Duty units. Agricultural and oversized-load haulers should look at our 48" units. For unusual vehicle shapes or where mounting is tricky, our 6" and 8" pair sets may work better than a single bar. Match the trailer plug type to your truck, choose between magnetic and strap mounting based on the vehicles you tow, and decide whether you need integrated strobes.

What size TowBrite do I need?

Roughly: 6"-8" pair sets for unusual mounting situations or vehicles with significant overhang; 22" for most passenger cars and light trucks; 36" for commercial single-bar use covering most jobs; 48" for oversized loads, mobile homes, and wide agricultural equipment. When in doubt, sizing up gives you better visibility and works on more vehicles.

Should I get strobes on my TowBrite?

If you operate a wrecker, recovery truck, or any roadside-assistance vehicle, integrated strobes give you a single mounting point that handles both DOT-required brake/tail/turn functions and amber warning lights. Our 36" with strobes and 48" with large strobes or slim strobes are popular for this. If your warning lights are already on the truck rather than on the load, a tow light without strobes will save you money.

Magnetic mount or strap mount — which is better?

TowBrite's standard Light Duty units include rubber-coated magnets sized for the model. Our main FAQ explains the magnet ratings in detail (66mm/25kg standard, 88mm/45kg upgrade option). Magnets are the fastest mounting option for steel-bodied passenger vehicles and the standard choice for tow truck operators. For aluminum, fiberglass, or plastic-body vehicles (Tesla, Corvette, Saturn, Smart, modern composite-bodied trucks), you'll need to use straps or place the bar inside a rear window — see our main FAQ for non-magnetic mounting options. Many operators use both magnets and straps together for highway-speed security.

What trailer plug should I order with my TowBrite transmitter?

Match it to whatever your towing vehicle and existing trailers use. If you have no specific requirement, our main FAQ recommends a 7-pin flat blade or 7-pin round receptacle — the 7-pin TowBrite transmitters integrate the circuitry entirely within the male trailer end, which is better shielded from the elements and more convenient. We also offer 4-pin flat, 6-pin round, and other configurations.

Can I use one TowBrite light bar with multiple trucks?

Yes. The light bar is portable and pairs with whatever transmitter is installed in the truck you're using. Most operators keep one transmitter per truck and one (or more) light bars that travel between trucks. If you have multiple trucks, ordering a TowBrite transmitter for each is much faster than swapping a single transmitter between trailer plugs.

Should I buy a backup TowBrite?

If you tow professionally, yes. A backup unit costs a fraction of what you lose when your primary fails and you can't complete a job. Many TowBrite customers keep a "demoted" older unit as the official spare once they upgrade to a newer primary. Even an older tow light that's no longer reliable for daily use is perfectly serviceable as an emergency backup.

What's a fair price for a quality wireless tow light?

TowBrite Light Duty units (22" lithium) start around $350 CAD. Our 36" lithium runs $675-$695 CAD depending on configuration. Heavy-duty 48" units with integrated strobes are $750-$775. The 6" and 8" pair sets are $475-$525. See current pricing on our product pages. For commercial operators, the higher-end units are almost always worth it — the cost difference is recovered quickly in reduced downtime and longer service life.

Installation and Setup

How do I install a TowBrite wireless tow light?

Plug the transmitter into your truck's trailer plug, place the light bar on the rear of the towed vehicle (magnets on a clean steel panel, or straps over a structural anchor), turn on the power switch on the light bar, and confirm operation by running through the brake, turn signals, and headlights. The whole process takes one to two minutes once you've done it a few times. Detailed setup is in our light duty manual and heavy duty manual.

Will TowBrite magnets damage my customer's paint?

If used correctly, no. The rubber-coated magnets prevent direct metal-on-paint contact. Damage typically happens when the rubber pads have worn through, debris is trapped between the pad and the paint, or the bar is dragged across the surface rather than lifted. Inspect your magnet pads regularly, clean both surfaces before mounting, and lift (don't slide) the bar into position. We deliberately don't use the strongest available magnets — anything stronger than our 88mm/45kg ratings risks paint damage. See our main FAQ for the full magnet rating discussion, including video demonstrations of our magnet pull tests.

Where should I place the TowBrite on the towed vehicle?

As high and as flat as possible. Trunk lids, tailgates, and rear hatches are ideal. The bar should be visible from at least 500 feet to the rear, mounted so brake and turn signals are clearly distinguishable, and positioned where it won't interfere with the vehicle's own lighting if any of it is still working.

How do I pair the transmitter to the light bar?

TowBrite transmitters and light bars are paired at the factory and remember each other automatically. When both units are powered on within range, they reconnect within a few seconds. If you ever need to repair (after a battery replacement, for example), see your model's manual for the procedure or contact us.

Why won't my TowBrite pair?

The most common causes are: low battery in the light bar (charge fully and try again), the units are out of range of each other, or significant RF interference nearby. If the unit has been working and suddenly won't pair, try a full charge first — battery issues account for most pairing complaints. If pairing still fails, contact us and we'll help diagnose.

How far apart can the transmitter and light bar be?

TowBrite wireless tow lights operate reliably well beyond the typical 30-50 feet between a truck and a towed vehicle directly behind it. Longer rigs (mobile homes, oversized loads) are also well within our operating range.

Do I need any tools to install a TowBrite?

Generally no. Magnetic-mount units require no tools at all. Strap-mount units need only your hands. The transmitter plugs into the trailer plug already on your truck. Tools come into play only if you need to install or repair the trailer wiring on the truck itself.

Operation and Use

How long does the battery last per charge?

Most TowBrite units run 10+ hours on a full charge with normal use. Our newer lithium battery products can run 24 to 72 hours per charge. Cold weather and heavy brake usage reduce runtime; running lights only is the lightest load.

Why are my running lights on all the time?

By default, TowBrite wireless tow lights have running lights on at all times — a safety feature most of the world has adopted. It's not required in the USA but improves visibility significantly. The trade-off is that running lights on continuously consume battery faster than brake/turn use only. If you'd prefer a configuration where the running light is triggered only by the brake or backup signal, we can rewire your transmitter and light bar to do this — see our main FAQ for details and check your local laws first.

Can I tow at highway speeds with a TowBrite magnetically mounted?

Yes. Properly mounted on a clean, flat steel panel, our magnets hold securely at highway speeds. The 88mm magnets in particular have a 45kg breakaway force per magnet — far more than the wind load on a tow light bar at 70+ mph. For maximum security, especially on bumpy roads or vehicles with curved or thick-painted rear surfaces, use both magnets and the included safety straps.

Can I leave the unit on between jobs?

You can, but you don't need to. The light bar has an internal radio receiver that draws power as long as it's switched on, so leaving it on between jobs slowly depletes the battery for no benefit. Switch it off when not actively in use and it'll last much longer between charges.

Will my TowBrite work in cold weather?

Yes. Our units are designed to operate in Canadian winters — we know the climate. Lithium batteries do lose some capacity in extreme cold (typically 20-40% reduction below freezing), so plan for shorter runtime in deep cold and consider keeping the unit warm in the cab until you actually need it.

Can I use my TowBrite in the rain or snow?

Yes. TowBrite wireless tow lights are very water resistant and handle hard rain, sleet, snow, road spray, and high humidity without issue. We even demo our lights fully submerged in water. However, as our main FAQ notes, the batteries don't love full submersion — if you're using a TowBrite on a boat trailer, detach it before backing into the water.

Will another TowBrite transmitter trigger my light bar?

No. Each TowBrite transmitter and light bar are paired at the factory with unique identifiers. Other transmitters on the same road or in the same yard won't activate your bar.

Will the wireless signal interfere with my truck's electronics?

No. TowBrite transmits on the 433 MHz band at low power, well within FCC and IC limits for unintentional interference. Our units won't affect your radio, GPS, key fob, or other vehicle electronics, and other electronics won't typically affect them.

Maintenance

How do I clean my TowBrite tow light?

Use a bucket of warm water with mild dish soap and a soft brush or cloth. Pay attention to the lenses, magnet bases, the trailer plug pins, and the charging port — all the places where road grime collects. Rinse with a garden hose at normal pressure (not a pressure washer) and let everything dry before storage.

Can I pressure wash my TowBrite?

No. Even on units rated as water resistant, a pressure washer can drive water past gaskets that handle rain just fine. Stick to a garden hose or hand washing.

Can I use brake cleaner on the housing?

No. Brake cleaner — especially chlorinated formulations — attacks plastic and can craze, cloud, soften, or crack the lens and housing over time. Use mild soap and water for the housing, and isopropyl alcohol or a plastic-safe degreaser for stubborn grease. Save the brake cleaner for metal parts and bare electrical contacts.

What's dielectric grease and should I use it on my TowBrite?

Dielectric grease is a non-conductive silicone-based grease that seals out moisture from electrical contacts without interfering with the connection. Applied to the pins of your trailer plug, the charging port, and any other plug-and-socket interface, it prevents the corrosion that causes most intermittent flicker, dim lights, and dropouts in aging wireless tow light systems. A small tube costs a few dollars and lasts for years. We strongly recommend it.

What should I check during regular inspections?

Quick visual after every job: pin condition on the trailer plug (no green or white buildup), magnet pads intact, no obvious cable damage, lenses clear. Deeper weekly check: cable jackets for cuts and abrasions, housing seals supple and seated, no condensation inside the LED lens, switches working crisply. Full service every season or every 3-4 months for daily users: clean and re-grease all electrical contacts, test all functions on a real vehicle, and check battery condition.

How should I store my TowBrite when not in use?

Charged (not empty), in a dry location, in a hard case if available, with the power switch off. For long-term storage (winter layup for occasional users), top up the battery every 1-2 months — see our main FAQ for more on battery longevity, including the importance of not letting batteries sit dead in cold weather.

Battery and Power

What kind of battery does a TowBrite use?

TowBrite wireless tow lights use rechargeable lithium batteries (with the exception of our Milwaukee/DeWalt-compatible models, which use those manufacturers' tool battery platforms). Lithium delivers excellent runtime, long cycle life, and good cold-weather performance compared to older sealed lead-acid or NiMH chemistries.

How long does a TowBrite battery last (lifespan)?

Typically 7 to 10 years before runtime drops enough to warrant replacement, as our main FAQ notes. Heavy daily users may see a slightly shorter life; occasional users can sometimes push past 10 years with good charging habits.

Can I replace the TowBrite battery myself?

Yes. Battery replacement is a simple job that anyone can do with basic hand tools. If you'd rather not, TowBrite can swap it for you in our Ottawa facility. Replacement batteries are available on our parts site.

How do I charge my TowBrite?

Use the included charger plugged into the unit's charging port. You cannot overcharge our batteries, so leaving the unit on the charger between jobs is fine — many TowBrite owners keep a permanently mounted charging cable in the truck or toolbox so the unit is recharging anytime it's not in use.

What if my TowBrite battery is swollen?

Stop using it immediately and replace it. A swollen lithium battery is at risk of venting, leaking, or in extreme cases catching fire. Don't puncture or crush it; bring it to a battery recycling facility for proper disposal. Contact us for a replacement.

Why is my TowBrite battery not lasting as long as it used to?

Three common causes: the battery has reached the end of its 2-3 year service life and needs replacement; the unit has been left dead in cold weather (which permanently reduces capacity); or running lights have been on continuously between jobs (which steadily drains it). The first is normal and expected; the second and third are easily prevented going forward.

Does TowBrite support 24v truck systems?

Yes, with a few caveats — see our main FAQ for the full explanation. Short version: all TowBrite transmitters support 24v (up to 32v), but the light bar batteries themselves are 12v, so you need a 12v charging source. We can help you set up the appropriate charging arrangement.

What chargers does TowBrite sell?

We stock replacement and accessory chargers for all our units, including standard wall chargers, vehicle chargers, and trickle chargers for long-term storage. If you need a specific charger and aren't sure which one fits your unit, contact us with your model details.

Troubleshooting

For TowBrite-specific troubleshooting beyond what's covered here, see our main FAQ — especially the entries on incorrect flashing patterns, the GMC/Chevy 10-second detection flash, and trailer detection issues with certain newer trucks.

My TowBrite won't turn on.

Most common causes, in order: dead battery (charge fully and retry), a failed power switch (test by depressing firmly), corroded battery contacts (clean and apply dielectric grease), or a damaged battery. If the unit shows no sign of life after a full charge, contact us for warranty service.

My brake lights aren't working but turn signals are.

This is almost always a transmitter or trailer wiring problem on the truck side. Test the truck's trailer plug with a tow plug tester to confirm the brake signal is reaching the connector. If the brake signal is present at the plug but not at the light bar, the transmitter may have an issue — contact us. If the brake signal isn't reaching the connector, the truck wiring is the cause.

Why does my TowBrite flash every 10 seconds when nothing is happening?

This is a common issue with certain newer trucks (notably the 2019-2020 GMC Sierra and Chevrolet Silverado 2500HD/3500HD) that have built-in trailer detection systems. The truck periodically pulses the trailer plug to confirm a trailer is still connected, and your TowBrite faithfully relays that pulse. It's normal; see our main FAQ for the full list of affected vehicles and the GM service bulletin that allows the dealer to lengthen the interval.

My TowBrite flashes the wrong way (left for right, or odd patterns).

Your truck likely has a non-standard trailer plug wiring configuration — different vehicle manufacturers occasionally swap pins. This is easily fixed by re-pinning either the truck-side wiring or the TowBrite transmitter. Contact us and we'll walk you through it.

My truck doesn't detect that the TowBrite transmitter is plugged in.

Some trucks try to profile connected trailers and can fail to detect low-electrical-load trailers like a TowBrite transmitter. Curt makes a part (57003) that solves this, or we can modify your transmitter at order time so it should be detected by most trailer detection systems — see our main FAQ. Contact us after ordering and we'll set it up.

The lights work but are dim.

Likely causes: low battery (charge fully), a dirty lens (clean it), aged LEDs that have lost output (typical after several years), or water inside the housing. Persistent dimming after a full charge usually means the unit is approaching end of life.

I see condensation or water inside the lens.

A small amount of fog that clears as the unit warms up is sometimes harmless. Persistent moisture or visible water means the housing seal has failed or the housing has cracked. Once water is in, internal corrosion has started — get the unit looked at right away. We can re-seal damaged housings in many cases; contact us.

The magnets aren't holding the bar.

Causes: rust pitting that has reduced effective contact area, debris between the magnet pad and the host vehicle, a thick paint layer, a non-ferrous panel (aluminum, fiberglass, plastic), or a curved surface preventing full magnet-to-metal contact. Solutions: clean both surfaces thoroughly, use safety straps as backup, or relocate to a flatter, cleaner steel panel.

My TowBrite tow light isn't pairing.

Charge fully first — low battery accounts for the majority of pairing problems. If pairing still fails after a full charge, check that you're within range and that no major RF source (a running welder, a powerful CB radio) is interfering nearby. If the issue persists, contact us for diagnostic help.

The transmitter LED is on but no signal is reaching the light bar.

The transmitter itself may be receiving power from the trailer plug but failing to transmit. This is occasionally caused by internal damage from a power surge or moisture intrusion. Contact us — we can usually diagnose remotely and either repair or replace the transmitter.

Theft Prevention and Tracking

Why are wireless tow lights and transmitters stolen so often?

They're valuable, portable, and often left exposed on parked tow trucks, shop floors, and yards. Transmitters are particularly stealable because they fit in a pocket and are commonly left plugged into the trailer plug even when the truck is parked. A good TowBrite setup represents a meaningful percentage of a tow truck's small-removable-equipment value.

Can I put an Apple AirTag inside a TowBrite tow light?

Yes — and many of our customers do. The water-resistant housing of a TowBrite light bar makes an excellent home for an AirTag or similar Bluetooth tracker. Hide it inside where a thief is unlikely to look, secure it so it doesn't rattle into the electronics, and you've added a recovery option that costs about thirty dollars.

What about putting a tracker inside a TowBrite transmitter?

Possible, but tighter. TowBrite transmitters have very little internal space, so an off-the-shelf AirTag often won't fit. Removing the tracker's plastic casing and re-waterproofing the bare electronics with heat-shrink or self-fusing silicone tape is one approach. The advantage is huge: thieves almost never think to crack open a transmitter looking for a tracker.

How do I prevent TowBrite theft?

Don't leave the unit on the vehicle when parked overnight — bring it inside. Store transmitters in the cab rather than leaving them plugged into the trailer plug. Keep tow lights in a locked compartment or toolbox in transit. Add a hidden tracker. Engrave your name or company information on the housing to reduce resale value. Replace easily-lost components individually with our hardware accessories and housings rather than buying whole new sets.

Will a tracker damage my TowBrite electronics?

If installed correctly — secured so it doesn't rattle into circuit boards, doesn't block the antenna, and doesn't interfere with switches — a tracker has no measurable effect on the tow light's operation. AirTags and similar trackers are very low power and don't generate meaningful interference at 433 MHz.

Replacement and Lifespan

How often should I replace my wireless tow light?

Heavy daily users typically replace every 2-4 years. Light commercial users get 3-5 years. Occasional users can comfortably push past 5 years with good care. The number isn't fixed — replace when reliability drops, when repair costs approach replacement cost, when water has gotten into the housing, or when the cumulative pile of small failures has eroded your trust in the unit. Battery replacement (typically every 2-3 years) is a separate, smaller intervention that extends the unit's life significantly.

When does it stop being worth repairing?

When you've spent more than 40-50% of the cost of a new unit on repairs in the last year, when water has gotten inside the housing or LED lens, when the housing is cracked or warped, or when small failures are stacking up faster than you can fix them. TowBrite can repair most issues inexpensively (we manufacture the parts ourselves), so contact us before assuming a unit is dead — but be honest about whether you're chasing reliability that's no longer there.

What should I do with my old TowBrite when I upgrade?

Demote it to backup duty. A unit that's no longer reliable as a primary is still a fantastic emergency spare — keep it charged and accessible in the truck. Check it monthly to make sure it still works. The day your primary fails on a job is the day the spare pays for itself.

Are newer TowBrite models meaningfully better?

Yes. Modern LEDs are dramatically brighter and more efficient than what shipped on units a few years ago, lithium battery chemistries hold more charge in smaller packages, and the radio chipsets are more reliable. If you're replacing a unit you bought a long time ago, take the time to look at our current product range before reordering — there's usually a meaningfully better option available at similar money.

Can I use my old TowBrite transmitter with a new light bar?

Sometimes, depending on which generations are involved. Our transmitters and receivers are paired by frequency and protocol, and across major product generations these can change. The safest approach is to contact us with your model details and we'll confirm compatibility.

Repairs and TowMate Compatibility

Can TowBrite repair my old TowBrite tow light?

Yes. We manufacture our own units in Ottawa, so we have parts and expertise on hand to repair most issues — failed LEDs, dead batteries, damaged housings, faulty transmitters, broken switches, and more. Send your unit to us with a description of the issue and we'll diagnose and quote the repair before any work is done.

Can TowBrite repair my TowMate, Lite-It, or other competitor's tow light?

In many cases, yes. We've helped a lot of customers extend the life of their existing equipment from other manufacturers. See our TowMate / Lite-It repairs page for what we can typically fix and how to send your unit in.

Are TowBrite parts compatible with TowMate?

We make a TowMate-compatible parts collection — receivers, transmitters, and other components designed to work with TowMate systems. If you're trying to extend the life of an existing TowMate setup or want to standardize across mixed equipment, this is worth a look.

Can I order replacement parts for my TowBrite?

Yes. We stock replacement batteries, chargers, LED lights, transmitters, receivers, housings, connectors, hardware, accessories, and testing tools. Buying the broken component rather than a whole new unit is almost always more economical.

Use Cases by Industry

TowBrite for tow truck and wrecker operators

For professional tow operators, our Heavy Duty tow lights are the standard — typically 36" or 48" with optional integrated strobes, lithium batteries for long shifts, strong magnets for fast deployment, and weather-sealed housings to survive year-round commercial use. Many operators run our 36" with strobes as a primary plus an older unit (or a smaller 22" model) as a backup.

TowBrite for RV haulers and mobile home transport

Our Mobile Home / RV / Transport lineup is built for the longer rigs and longer days of professional RV and mobile home transport. The wider light bars provide better visibility on oversized loads, and the long battery runtime handles long-distance hauls without recharge stops.

TowBrite for agricultural equipment

Our Agricultural tow lights are sized and configured for farm equipment haulers — implements, tractors, balers, combines, and other agricultural machinery moved on rural roads. Strap mounting is common since agricultural equipment surfaces are often non-magnetic or irregular. Ruggedness and battery life matter most.

TowBrite for flatbed delivery

Flatbed operators delivering vehicles, equipment, or construction materials often need a wireless tow light bar mounted to the rear of the load (or the back of the flatbed itself when loaded). Quick install matters for high-volume operations — our magnetic-mount units redeploy in seconds.

TowBrite for personal vehicle transport

Hobbyist car haulers, people moving a second vehicle on a tow dolly, or anyone occasionally moving a vehicle benefit from our lighter-duty 22" or 36" lithium models. They're easy to install and will outlast the tow dolly itself with reasonable care.

TowBrite for boat trailers

Wireless tow lights solve the classic boat trailer lighting problem — submerging traditional wired lights when launching is what kills them. A TowBrite unit that sits high on the boat (above the waterline) and removes between trips eliminates the issue entirely. Just don't submerge the unit itself — see our main FAQ for the boat trailer warning.

TowBrite for construction equipment

Construction equipment haulers benefit from our heavy-duty units with strap-mount options for the irregular, often non-magnetic surfaces of construction machinery. Bright daytime visibility matters because most construction equipment is moved during daylight hours when ambient light makes signaling harder to see.

TowBrite for fleet operators

For fleets, standardizing on one TowBrite product line across all trucks simplifies training, parts inventory, and replacement planning. We work directly with fleet purchasers on volume orders, custom configurations, and consistent transmitter pairings across multiple trucks. Contact us to discuss fleet pricing and standardization.

The Tow Light Glossary

A comprehensive reference of terms used throughout this Encyclopedia and across the wireless tow light industry. Where a term has a TowBrite-specific meaning, it's noted.

Connectors and Plugs

4-pin flat connector
The standard light-duty trailer wiring plug used on passenger vehicles, small trailers, and most light-duty applications. Carries left turn, right turn, brake/tail, and ground signals on four flat blade contacts.
5-pin flat connector
A less-common variant of the 4-pin flat that adds a fifth pin for the reverse light or a hydraulic brake disable signal.
6-pin round connector
A round connector commonly used on horse trailers, livestock trailers, and some agricultural equipment. Adds a 12V auxiliary power circuit and brake controller signal beyond the basic 4-pin functions.
7-pin flat blade connector
A heavy-duty trailer plug used on tow trucks, RVs, and heavy trailers. Carries the four basic functions plus brake controller, reverse, and 12V auxiliary power. TowBrite recommends 7-pin flat blade or 7-pin round receptacle for new installations.
7-pin round connector
The North American standard for heavy-duty trailer wiring. Functionally equivalent to 7-pin flat blade in carried signals; the difference is the physical pin layout.
Pin-out
The map showing which signal travels on which pin of a connector. Standardized in most cases but occasionally varies by manufacturer.
Pigtail adapter
A short cable with a different connector on each end, used to convert between connector standards.
Trailer plug
The general term for the standardized electrical connector on the towing vehicle that provides power and signals to trailer lighting.
Trailer wiring harness
The complete cable assembly that runs from the towing vehicle's electrical system to the trailer plug.

Lighting Functions and Components

Brake light
The red rear light that illuminates when the brake pedal is pressed. Required on all towed vehicles in North America.
Tail light
The red rear light that illuminates whenever the vehicle's headlights are on, providing constant rear visibility at night.
Running light
Synonymous with tail light in most contexts. TowBrite units default to running lights on at all times for safety.
Marker light
Smaller side-facing or rear-corner lights that indicate the vehicle's outline and width to other drivers.
Turn signal
The flashing amber or red light that indicates an intended turn or lane change.
Hazard flasher
Both turn signals flashing simultaneously, used to indicate a stopped or disabled vehicle. Standard on TowBrite units.
Reverse light / Backup light
The white rear light that illuminates when the vehicle is in reverse. Supported by many TowBrite models.
ICC bar
Interstate Commerce Commission bar, the rear underride guard required on most commercial trailers.
DOT triangle
A reflective warning triangle carried in commercial vehicles for use when stopped on the roadside.
Conspicuity tape
Reflective red-and-white tape applied to commercial trailers to improve nighttime visibility.
Strobe light
A high-intensity flashing light, typically amber for warning and caution use. TowBrite offers integrated strobes on several heavy-duty wireless tow lights.
Beacon
A continuously rotating or flashing warning light, typically mounted on the cab of a tow truck.
Amber warning light
Yellow/amber flashing light used by tow trucks, recovery vehicles, road maintenance, and other authorized vehicles.
LED (Light Emitting Diode)
The semiconductor light source used in all modern TowBrite tow lights. Far more efficient, brighter, and longer-lived than incandescent bulbs.
Lumen
A measurement of total visible light output. Higher is brighter overall.
Candela
A measurement of light intensity in a specific direction. More relevant than lumens for directional lights.
Beam pattern
The shape and distribution of light emitted from a fixture.
Lens
The clear or coloured plastic cover that protects the LED and shapes the emitted light. TowBrite uses durable polycarbonate lenses for impact resistance.
Reflector
The shaped surface behind the LED that directs light forward.
Driver chip / LED driver
The electronic circuit that regulates current to the LEDs.

Mounting Hardware

Magnetic mount
Attachment system using rare-earth or ceramic magnets covered with rubber pads to grip ferrous metal panels. The standard for TowBrite Light Duty units.
Strap mount
Attachment system using adjustable straps with hooks that anchor to structural points on the towed vehicle. Used on aluminum, fiberglass, and plastic-bodied vehicles.
Suction cup mount
Less common; uses vacuum suction to grip smooth glass or painted surfaces. Not used by TowBrite for primary mounting.
Rare-earth magnet
A class of strong permanent magnets, typically neodymium-based.
Ceramic magnet (ferrite)
A more affordable, less powerful magnet type used in some entry-level tow lights.
Neodymium magnet
The strongest commonly available permanent magnet material.
Breakaway force
The force required to pull a magnet directly off a steel surface. TowBrite's standard 66mm magnets have a 25kg (55 lb) breakaway force; the 88mm upgrade has 45kg (97 lb).
Pull force / shear force
The force required to slide a magnet sideways off a steel surface.
Magnet boot / pad
The rubber or vinyl covering on a magnet base that prevents direct metal-on-paint contact.
D-ring
Metal ring attached to the corners of a tow light bar, used as an anchor point for safety straps.
Safety strap
Adjustable strap with hooks used to back up magnetic mounting or to provide primary mounting on non-ferrous vehicles.

Electrical and Electronic

AWG (American Wire Gauge)
The standard for measuring wire diameter in North America.
Voltage drop
The reduction in voltage along a length of wire.
Ground
The common return path for electrical current.
Diode
A one-way electrical valve.
Pulse width modulation (PWM)
A technique for controlling LED brightness by rapidly switching the current on and off.
Capacitor
An electronic component that stores and releases electrical charge.
12V system
The standard electrical system voltage in passenger vehicles. TowBrite light bars run at 12V internally.
24V system
A higher-voltage electrical system used in some heavy-duty trucks. TowBrite transmitters support up to 32V.

Battery Technology

Lithium-ion (Li-ion)
A rechargeable battery chemistry offering high energy density and long cycle life. The standard in modern TowBrite units.
Lithium iron phosphate (LiFePO4)
A lithium chemistry variant offering exceptional cycle life and cold-weather performance.
Sealed lead acid (SLA)
An older rechargeable battery chemistry, heavier and shorter-lived than lithium.
Nickel metal hydride (NiMH)
A mid-generation rechargeable chemistry between SLA and lithium in performance.
Charge cycle
One complete discharge and recharge of a battery.
Cycle life
The total number of charge cycles a battery can deliver before significant capacity loss.
BMS (Battery Management System)
Electronics inside a battery pack that monitor voltage, temperature, and current.
Trickle charger
A low-current charger designed to keep a battery topped up over long periods.
Amp-hour (Ah)
A measurement of battery capacity.
Watt-hour (Wh)
A measurement of total energy capacity.

Wireless and Radio Frequency

433 MHz
The radio frequency band TowBrite wireless transmitters operate on.
ISM band
Industrial, Scientific, and Medical radio bands set aside for unlicensed low-power use.
FCC ID
The certification number issued by the U.S. Federal Communications Commission. TowBrite's FCC ID is 2AWK3-TBR433TX.
IC ID
The certification number issued by Innovation, Science and Economic Development Canada. TowBrite's IC ID is 26388-TBR433TX.
Pairing
The process of establishing a wireless link between transmitter and light bar. TowBrite units are paired at the factory.
RF interference
Disruption of a wireless signal by another radio source.
Range
The maximum effective distance between transmitter and light bar.
Transmitter
The TowBrite electronic unit that plugs into the towing vehicle's trailer plug.
Receiver
The radio circuit inside the light bar that receives the transmitter's signal.
Antenna
The radio element in the transmitter and receiver.
Latency
The time delay between an action and the corresponding response on the light bar.

Towing and Vehicle Terminology

Towing vehicle (towing unit)
The vehicle providing the motive power.
Towed vehicle
The vehicle being moved.
Tow combination
The towing vehicle plus the towed vehicle considered as a single unit.
Wrecker
A truck equipped to recover and tow disabled vehicles.
Rollback / flatbed
A tow truck with a hydraulically tilting flat deck.
Tow dolly
A small two-wheeled trailer that lifts the front wheels of a vehicle so it can be towed.
Recovery vehicle
A heavy-duty wrecker equipped for accident recovery.
Pintle hitch
A heavy-duty hitch using a hook and ring coupling.
Ball hitch
The standard light-duty trailer hitch.
Receiver hitch
A square tubular socket on the towing vehicle.
Gooseneck hitch
A heavy-duty hitch mounted in the bed of a pickup truck.
Fifth wheel
A heavy-duty trailer hitch type used in commercial trucking and large RV applications.
Safety chains
Steel chains connecting the towing and towed vehicles as a backup.
Trailer brake controller
An in-cab device that operates electric brakes on the towed vehicle.
GVWR
Gross Vehicle Weight Rating — the maximum allowable loaded weight of a single vehicle.
Tongue weight
The downward force exerted by a trailer on the towing vehicle's hitch.

Maintenance and Service

Dielectric grease
Non-conductive silicone-based grease applied to electrical contacts to seal out moisture. Strongly recommended for TowBrite trailer plug pins and charging ports.
Contact cleaner
A solvent-based spray for cleaning corroded electrical contacts.
Corrosion
The chemical degradation of metal contacts. The most common cause of intermittent tow light failures.
Conformal coating
A thin protective coating applied to electronic circuit boards to seal out moisture.
Heat-shrink tubing
Polymer tubing that shrinks tightly when heated.
Self-fusing silicone tape
A stretchable silicone tape that bonds to itself but not to other surfaces.

Operations and Inspection

Pre-trip inspection
A formal walkaround of a vehicle and its load before driving. Wireless tow lights belong in every pre-trip.
Walkaround
A visual inspection of a vehicle and its connections.
Functional test
Operating each control or function and verifying the corresponding light or system responds correctly.

Troubleshooting Terms

Intermittent
A fault that comes and goes.
Dropout
A momentary loss of signal between transmitter and receiver.
Flicker
Rapid on-off cycling of a light, usually caused by a poor electrical connection.

Regulatory Bodies

FMCSA
U.S. Federal Motor Carrier Safety Administration. Sets and enforces commercial vehicle safety rules in the USA, including the wireless tow light exemption.
DOT
U.S. Department of Transportation.
FCC
Federal Communications Commission. Issued TowBrite's FCC ID 2AWK3-TBR433TX.
IC / ISED
Innovation, Science and Economic Development Canada. Issued TowBrite's IC ID 26388-TBR433TX.
FMVSS 108
Federal Motor Vehicle Safety Standard 108, the U.S. regulation governing vehicle lighting requirements.
CMVSS
Canada Motor Vehicle Safety Standards.
NHTSA
U.S. National Highway Traffic Safety Administration.

TowBrite-Specific Terms

TBR433TX
TowBrite's transmitter model designator, used in our FCC and IC IDs.
TrailerVolt
TowBrite's product line for trailer power applications.
TowMate Compatible
TowBrite parts collection designed to work with TowMate-brand systems.
Light Duty / Heavy Duty
TowBrite's primary product categorization.
Lifetime Limited Warranty
TowBrite's standard warranty coverage on all tow lights.

Still Have Questions?

This Encyclopedia is designed to be the most comprehensive plain-language reference on wireless tow lights anywhere on the web. If you have a question that isn't answered here, on our main FAQ, or in our product manuals, contact us. TowBrite is a small Canadian manufacturer based in Ottawa, Ontario, and we genuinely answer the phone — whether you're a TowBrite customer or just trying to understand what you bought from someone else.