Heavy Duty Tow Light Manual | TowBrite

Turning On / Off

TowBrite wireless heavy duty tow lights have a primary power switch which turns the unit on and off as indicated on the switch.  This disconnects and reconnects the power to the unit.

Tow lights which have a strobe function will also include a second switch to turn on and off the strobes.  You must turn on the tow light itself, before turning on the strobes.


Bootup sequence

TowBrite wireless tow lights give a little information when they start up.  The left turn signal flashes to represent the current firmware version.  The right turn signal flashes to display the battery voltage.  

  • 1%-25% = 1 flash
  • 26% to 50% = 2 flashes
  • 51% to 75% = 3 flashes
  • 76% to 100% = 4 flashes

Note that lithium battery powered tow lights will only provide 3 flashes when fully charged.



All TowBrite wireless tow lights have a one-way pairing feature.  Each transmitter is equipped with a unique ID which is learnt by the tow light receiver.  When turning on the wireless tow light receiver it enters into a learning mode for 30 seconds; if it detects a left turn signal it will forget about any previously learnt IDs and write to memory the new one which it just detected.  If no left turn signal is detected, the receiver will stay in learning mode.

  1. Plug transmitter into your tow truck
  2. Engage the left turn signal of your truck
  3. Turn on the wireless tow light
  4. Wait until you see the wireless tow light start to flash in sequence with your truck.



The range of your wireless tow light should be around 1000ft.  This may seem like a lot, but trailers and broken down trucks are excellent blockers of wireless signals, so sometimes the wireless waves need to bounce off objects in the distance to reach the tow light.

If you are getting poor wireless performance, you may wish to relocated your transmitter.  It is generally not a good idea to place your transmitter inside any steel or aluminum tool boxes.  Operators will often install an auxiliary trailer plug on the light pylon since all the necessary wires are already there and it's high up and unobstructed.  This may also help prevent your transmitter from getting stolen or damaged by chains as compared to being accessible at ground level.



TowBrite transmitters come in several formats.  7-pin round (heavy truck) and blade (RV style) will typically contain the transmitter within the housing of the connector.  4-pin round and 6-pin round will all have the transmitter PCB encapsulated in plastic resin and attached to the connector. 4-pin flat and hardwire have the transmitter encapsulated in plastic resin with attachment wires coming out and visible.



All TowBrite products use the same receiver.   It will be typically fully encapsulated in plastic resin and is not serviceable or re-programmable.  If you feel your transmitter is not working and needs replacement, please send us a video of the receiver when it is powered up.  We may be able to diagnose any problems by the LEDs' flashing sequence.

Note: Some newer 17" and 22" tow lights now have the receiver integrated into the LED light)



Ideally you should charge your wireless tow light whenever it is stowed in your truck.  Under most conditions, your tow light should last for more than 24 hours.  It really depends if you're in stop-and-go traffic or rolling down the highway.  (more turn signals and brake lights consume more power).


Power (+12v) should be supplied to your tow light through the center pin of your connector and the ground should be on the largest pin.  The OEM connector provided by TowBrite has an integrated LED which shows when there's power to the plug.

Alternatively, you can connect the 7-way trailer connector to a automotive style battery charger.  You should not exceed 1 amp when charger and it should take about 8 hours for a full charge.  Take note that a lot of battery chargers will not light up the indicate LED on the TowBrite supplied connector until it detects some existing voltage on the battery.

If you're tow light is powered by a 3rd party external power tool battery, you should be charging your battery with the manufacturer supplied charger.  On these models, the center pin is not connected to power.



Lithium:  All newer TowBrite heavy duty wireless tow lights come equipped with lithium batteries.  There are a few different models available depending on when you purchased and the options selected at time of purchase.  These batteries have been made specifically for TowBrite and cannot be purchased at any local retailer.  Please contact TowBrite for a replacement, should it be required.

TowBrite's lithium batteries are much longer lasting than their lead acid counterparts - both by way of runtime and life span. 


Lead Acid:   Some older TowBrite heavy duty wireless tow lights come equipped with lead acid batteries and are 6volt 7ah connected in series giving 12 volts.  They can be user replaced and are common, but can also be bought directly from TowBrite.  Batteries bought locally will require a little soldering to move the wires over. Batteries should take 8 hours or less to charge and have an expected run time of 10 to 12 hours.  You should anticipate replacing your batteries every one or two years, depending on use.