Trailer Light Issues

[smx949]

Does anyone know why my trailer lights are all messed up. Wheres my first place to start they are hooked up right but some wont work when others do.

Let me know if you need more info.

[enoyes12]

Are you saying that the truck plug is wired correctly but not all of the trailer lights are working?

[enoyes12]

If that is the case and the bulbs are good then check the ground connection on each light. Most lights are grounded through the mounting bolt if they are mounted to the frame. You can tell if you have that kind of light because there's only one wire going to it. If it is the ground connection clean the contact point and use dielectric grease at the ground points. It will keep the corrosion down

[smx949]

No, Its on the truck side, I'll go check it out again right now.

[Zen]

Are you saying some trailers lightw work right and others don't, or are you saying some of your trailers lights work and others don't on the same trailer?

If on the same trailer check all the fuses in the PDU under your hood. Fuses 1 and 3 are the main ones for turn signal and brakes on the trailer.