Troubleshooting Left Stop/Turn Circuit of Trailer Wiring Not Working

Question:

All lights work on my trailer but left turnal and left brake, all other functions are working. I hooked trailer up to friends truck and lights worked fine so im assoming the problem is my truck. The other day the light randomly started working fine for about an hour and then stopped again. Does anyone have any ideas?

asked by: Austin

Expert Reply:

It's probably a bit of corrosion that's on the pins of your trailer wiring connection on the vehicle side which is causing an intermittent at best connection. Typically just taking some sandpaper to the pins of the 4-way will take care of this.

I attached a link to a page that has a help article on troubleshooting trailer wiring for you to check out as well.

expert reply by: Jameson C