Trailer lights only illuminating on the passenger side

[Sidewayz]

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!

[Ianf]

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.

[Sidewayz]

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

[Britt Lifsey]

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?

[Sidewayz]

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

[Sidewayz]

Checked two other trailers and same outcome

[Britt Lifsey]

You might check fuses. On an older truck (2005), trailer light fuses were in box under hood.

[Sidewayz]

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

[DAY11]

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

[Sidewayz]

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.

[cpttimerestraint]

On the 2014 there are separate fuses for each trailer light function

 

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[Sidewayz]

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.

[Sidewayz]

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

[Britt Lifsey]

Great! Glad to hear you got it going.

[Sidewayz]

Thanks! Was driving me nuts!