Most drivers assume one thing when they hook up a trailer: if my truck lights work, the trailer lights must be working too. It sounds reasonable—until the connection at the 7-pin plug has green corrosion inside, a wire snapped somewhere under the deck, or the trailer sat outside all winter and the ground circuit died. Then the truck brakes light up, the turn signal clicks, and the back of the trailer stays dark. Nobody in the cab knows. The guy behind you finds out first.
That gap—between what the truck sends and what the trailer actually shows—is where most backing accidents and roadside citations start. Not with a blown bulb. With silence.
Wired trailer lighting has been around forever, and so have its failure modes:
Pinched or snapped harnesses under the frame
Corrosion at the plug from rain, snow, and road salt
Ground-loop issues that make one side dim and the other flicker
An hour of bracket drilling and zip-tie routing just to move lights to another trailer
No way to confirm rear status without someone standing behind the rig
For fleet operators, RV owners, and farmers running three or four different trailers a week, that maintenance tax adds up fast. The light bar isn't the problem. The wire is.
The AgriEyes AG-T328 takes the wiring out of the equation and puts the charging on the roof. It's a 23-inch single light bar—tail, brake, amber turn, white reverse, and hazard strobe in one sealed housing—that talks to the truck over a 2.4GHz link and keeps its own 2200 mAh cell fed through a top-mounted solar strip during daylight running.
What that changes in practice:
Solar charging means the bar trickle-feeds itself on long hauls. No reminder to plug it in Sunday night.
Type-C port on the side takes it from empty to full in about 2.5 hours when the sun isn't enough.
No harness means it moves from a flat-deck to a boat trailer to a header transport in under a minute—magnet base, suction cup, two steel tethers.
One bar, not two reads cleaner on a wide RV or ag implement than a pair of clamp-on pucks.
This is the part most trailer light kits still miss. They send a signal out. They don't send anything back.
Paired with the RX501 in-cab receiver (plugged into the 12V/24V cigarette lighter), the AG-T328 closes the loop. The receiver mirrors exactly what the bar is doing—left turn, right turn, brake, tail, reverse—with dedicated icons on its face. It also shows battery level for the bar and, if the 2.4G link drops or the unit loses power mid-transit, answers with flashing icon plus a built-in buzzer.
The driver doesn't guess. The driver sees tail on, brake on, left on—or hears the alarm and knows the rear just went dark. That feedback path is the same logic AgriEyes already ships on the T28/T327 family with RX501, and on the T328 it rides on top of solar self-charging so the whole chain needs less hands-on care.
RV owners on multi-day runs get a rear bar that charges while they drive and confirms itself in the dash.
Boat trailer owners dealing with saltwater corrosion get a removable wireless unit instead of another corroded harness.
Farm and construction crews rotating between implements keep one T328 on the bench and move it to whatever deck is leaving the yard that morning.
Truck operators running 30-foot tag trails use the reverse white light plus the "Di-Di" pedal alarm as a yard cue, not just a visual.
Sealed to IP69K-level washdown resistance and rated -23 °C to 65 °C, the bar sits outside in a Saskatchewan January or an Arizona July without a second thought.
Drive smarter. Tow safer. Stay connected with the AgriEyes AG-T328 Solar Wireless Towing Light Bar—now in the Trailer Lights collection.
