One Trailer Tail Light is Not Working

Question:

My right tail light is out,front marker works,I switched lights left to right its not the light. What else can I check?

asked by: Javier

Expert Reply:

Since it's just the right tail light that is not working properly, it is very likely a bad ground; you will want to make sure your light has a good ground; clean the mounting hardware of the light assembly if it grounds through the hardware, or if it uses a wire, ensure that ground is good.

Also check the wiring going to the light to see if it is damaged in any way, and check the power going into the light just to make sure that wiring is good; you can do this with the Cordless Circuit Tester # PTW2979.

I have added links below to a pair of help articles on trailer wiring, including a troubleshooting guide for you to take a look at. Additionally, to help prevent any type of corrosion in your connector, and increase its durability and lifespan I highly recommend using Dielectric Grease for Electrical Connectors # 11755.

expert reply by: Kyle S