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Trailer lights only illuminating on the passenger side


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Posted

Very excited for my birthday weekend fishing trip. Load the gear load the dogs load the family. Do my pre trip inspection and low and behold the left side lights are out. Went and bought new lights same issue nothing works on the left side. Anyone have this issue? Just to clarify the trucks lights are fine it's only the trailer. Pulled the boat last month with no issues and now this. Guess who is not going away for their birthday now. Any help is appreciated before calling the dealership.

Thanks!

Posted

If it's just the left side of the trailer it has to be the trailer wiring, bulbs or sockets as the right side uses the same wiring as the left from the truck.

Posted

I thought it was the trailer also but when I bought a new light kit and wiring it did the same thing. I plugged in the 7 prong to 4 adapter and it has indicator lights on it and one of them was not blinking with the hazards. I'm going to connect the trailer to my wife's minivan and see if there is a difference to rule out the trailer

Posted

If it is trailer, ground connections are usually cause of odd ball issues. When you say one of the indicator lights was not flashing, does that mean only one of the 3 indicator lights or 1 of the 2 that are for turn signals? How many were flashing?

Posted

It has 3 lights one for each turn signal and one for power. I'm gonna try the waverunner trailer this afternoon.

Posted

Checked all the fuses under the hood also. Made an appointment for Monday.

Posted

Could it be the 7 to 4 adapter? Or was that just used to test system

Posted

I tried a different adapter and even the 4 prong under it. May get the volt meter on it tomorrow and see what's happening before going to the dealer.

Posted

Fuses are good. When I talked with the service dept they said they start at the plug and work their way towards the fuse box. He made it sound like they are planning on changing the wiring out before even seeing the truck.

Posted

Used a test light and there was no power to the left side TS on either port. 7 pin or 4. Followed the wire back and it was not all the way in the connector under the truck.

 

All fixed no need to go to the dealer tomorrow :)

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