Alright on my 01 the trailer lights are jacked. Its got the 7 plug and the only thing that is working is the left turn and brake light. Nothing else is hot. I checked all the fuses and looked underneath but nothing. Any other ideas ? Is there a relay that could do that ?
Help brothas ! Thanks

 

There are 2 relays and 2 fuses that have to be installed. I got mine at the dealership.

 

no the prob is that it came stock with it and it all used to work. forgot to throw that in there.

 

I can only suggest that you make sure the ground is good on the circuit. I think the major problem with trailer lights is the ground, especially if multiple lights are affected like yours.