Trailer wiring problem, taillight on when car is off?

Question

Hi,

I have a brand new car hauler tailer with LED lights. I have a GMC Yukon with the round (7 pin I think) plug. I noticed when I got home that the right rear two tail lights are still dimmly on. All other lights are off. This is with my car off, parked, and sitting in my driveway. I had to unplug the trailer from the Yukon to get the right rear red taillights to go off.



I have another trailer with regular lights. I have never seen the right rear dimly on when the car is off.

I have to figure it's in the car. For some reason one power wire must still be hot when the car is off or have a tad bit of juice to it. Any ideas? Is there a tester I should buy?

Thanks,
Steve

Answer 1

Definitely a hot wire somewhere! Check and see if one might be touching inside the plug or possibly grounding to the plug itself. You're getting feed from somewhere and the only way to find it is tracing it out!

Answer 2

i had that problem once too, i traced my problem to the flasher relay in the fuse box. i replaced it with a new one and the problem went away.