The Best Hiding Spot You're Not Using: Putting AirTags Inside Wireless Tow Light Transmitters

In a previous post we talked about dropping an AirTag into a wireless tow light bar — the magnetic LED unit that sticks to the back of the vehicle. That's a great move. But there's another piece of the system that almost nobody thinks to track, and it's actually the more attractive target for thieves: the transmitter.

If you run wireless tow lights, you already know the transmitter is the small box that plugs into the truck-side wiring and sends the signal back to the light bar. It's compact, it's expensive, and it spends most of its life dangling off the back of a tow truck. That combination makes it one of the easiest pieces of equipment to lose — and the easiest one to recover, if you've planned ahead.

Why transmitters get stolen so often

Wireless tow light transmitters check every box on a thief's wish list. They're small enough to disappear into a jacket pocket without anyone noticing. They're worth a few hundred dollars new, which is enough money to motivate someone walking past a parked tow truck at 2 a.m. They're almost always left exposed — plugged into a 7-pin connector under the bumper, or sitting on a tailgate between jobs. And the resale market for them is decent enough that they move quickly online.

The light bar at least has some bulk to it. A transmitter, by contrast, fits comfortably in one hand. Walk by, unplug, walk away — the whole crime takes about four seconds.

For a busy shop or a fleet, this isn't a hypothetical. Transmitters disappear constantly, and most of the time you have no idea whether it was a thief, a forgetful coworker, or a customer who somehow drove off with it still attached. A tracker hidden inside takes all the guesswork out.

Why the inside of a transmitter is the perfect hiding spot

Here's what makes transmitter housings such a clever place for a tracker: nobody opens them.

When someone steals a piece of gear and worries it might be tracked, they check the obvious places. They look at the outside surfaces. They check inside the magnetic light bar, because that's where someone might tuck a tag. They might even take a quick look around the wiring harness. But almost no one — even experienced thieves — thinks to crack open the transmitter housing itself. It's just an electronics box. It looks like circuit boards and not much else. Why would there be a tracker in there?

That assumption is exactly what makes it work. A tag hidden inside a sealed transmitter housing can keep reporting its location for weeks while the thief drives it around, sells it, or hands it off to someone else. By the time anyone thinks to look, you've already had plenty of time to involve the police and recover it.

The catch: not every tracker will fit

Before you go pulling apart your transmitter, a dose of reality. Wireless tow light transmitters are not designed with extra room inside. They're packed tight with a circuit board, antenna, battery (in some models), and weather sealing. The free space inside ranges from "barely any" to "just enough for something thin and small."

This is where tracker selection matters. An Apple AirTag is roughly the size and thickness of a stack of four quarters — a little over 8mm thick — which means it might not fit inside a transmitter housing in its original form. Some Samsung SmartTag variants are a touch slimmer, and there are specialty Bluetooth coin-style trackers built for tight spaces that may fit where an off-the-shelf AirTag won't.

Before you commit to a tracker, open the transmitter (carefully, and only on your own gear), measure the empty volume inside, and pick a tag that fits without pressing against the circuit board, blocking the antenna, or interfering with any internal switches. Forcing a too-large tracker into the housing can damage the electronics, void the warranty, and in the worst case make the transmitter stop working altogether — which defeats the whole point.

If nothing seems to fit, you have one more option: remove the tracker's plastic casing. The actual electronics inside an AirTag or similar device take up far less space than the finished product, and stripping the shell off can be the difference between a tag that fits and one that doesn't. Just be aware that you've now removed the tracker's weather seal. Re-waterproof the bare electronics before you install them — heat-shrink tubing, a thin layer of conformal coating, or a snug wrap of self-fusing silicone tape all work — because a transmitter housing isn't a guaranteed dry environment, and a soaked tracker is a dead tracker.

A bonus benefit: if the truck goes, the tracker goes with it

Here's the angle most people don't consider. The transmitter is usually plugged into the truck and stays plugged in for long stretches. If your whole tow truck gets stolen — and tow trucks do get stolen, both for the vehicle itself and for the equipment they carry — that hidden tracker just became a tracker on your truck.

Sophisticated truck thieves know to look for and disable factory GPS units. They often check for obvious aftermarket trackers around the dash, under the hood, or in the cab. What they almost never do is unplug a wireless tow light transmitter and crack it open, because in their mind it's just an accessory. So while they're rolling down the highway thinking they're clean, your hidden tag is quietly pinging every iPhone it passes.

This won't replace a proper cellular GPS unit for high-value vehicles — those still belong on any tow truck or fleet vehicle worth real money — but it's a meaningful second line of defense, and it costs about thirty bucks.

A few practical tips before you start

A handful of things worth keeping in mind. First, document the inside of your transmitter with a photo before you modify anything, so you can put it back together correctly. Second, use a non-conductive material — a small piece of foam, a strip of electrical tape, or a dab of hot glue — to keep the tag from rattling around or shorting against the board. Third, make sure the housing still closes flush; a transmitter that doesn't seal properly will let moisture in and fail in a season or two.

And the same advice from the tow light post applies here: swap the tracker's battery once a year on a date you'll actually remember, and consider hiding a second tracker somewhere else on the truck or in the cable bundle. If a thief somehow finds the one in the transmitter, the second tag is still doing its job.

Bottom line

Wireless tow light transmitters are stolen far more often than people realize, precisely because they're small, valuable, and exposed. The same compact size that makes them easy to pocket also makes them surprisingly good hiding spots for a thin Bluetooth tracker — as long as you pick one that actually fits. And as a bonus, that hidden tag rides along with your truck every time you go out, ready to lead you home if the worst ever happens.

Pick the right tracker, find a spot for it inside the housing, and you've turned one of your most stealable pieces of gear into one of your most recoverable ones.