On my work trailer, suddenly all of the trailer lights went out except one tail light. Any suggestions?

Question

I just replaced the at the connection and they seem fine. Fuses look OK. All of the lights went out at the same time, except for one tail light.

Answer 1

sounds like its time to rewire the thing. all your tail lights are tied to a brown wire. so if only one works then its either wiring or bulbs or both. now the turn signals/brake lights are tied to the green and yellow wires. if those arent working then once again bulbs and wiring. also make sure you have the trailer grounded properly. grounding the trailer through the ball or reciever only causes more problems. the white wire should ground properly to the trailer and the vehicle frame. this is of course if you are using a simple four wire connector. if you have a 7 to 4 connector make sure its not bent or corroded

Answer 2

if you keep an open mind, it's funny!!!! On the other hand, there's a lesson, here, make sure you check your trlrs. It's not funny, when a horse goes, through rotted floor boards, or the trailer comes off the ball.Seen instances of both. Not a happy sight, ever wonder why some don't want to load? sorry, to spoil your fun. Just saw a chance to maybe help someone, become aware.And help avoid problems.

Answer 3

a poor ground is usually 70% of the problem. Check the ground on the battery of the truck, on the frame, pigtail ground on the trailer and the truck. All the grounding points on the running lights, tail lights. Its a pain in the neck but it will trouble shoot where the problem is. (Hubby knows)

Answer 4

ground wire