Trailer Lights and Accessories with Lights Not Working When Connected to Tow Vehicle

Question:

I asked a question yesterday but now the running light on the tailgate light isnt working but blinkers are?

asked by: Ryan

Expert Reply:

It sounds like you might have a dirty or corroded trailer connector on the vehicle. This is a common occurrence since connectors are exposed to the elements. If the connector is a 4-Way flat then if you have a small wire brush you can clean the pins. A small screwdriver could also work but it takes longer to clean out the corrosion.

If you have a 7-Way trailer connector you can use a wire brush to clean the pins but also you will want to check the back of the connector where the wires attach and clean away any corrosion.

It is also possible that there is a bad tow package fuse, fuses, or relay(s) that need to be replaced.

expert reply by: Michael H