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Trailer Lights Not Working When the Headlights are Turned On 1990 Coleman Pop-Up


Lighting Problems on 1990 Coleman Pop-Up, the signal and the brake lights works fine but they dont stay one cant drive it at night any suggestion, thanks


Expert Reply:

It sounds like your trailer taillights are working until you turn on your head lights.

This means you have a ground issue. When the headlights are on the highest amperage draw is placed on the wiring system and, a faulty ground will show at this time. Make sure you have good metal to metal contact. Paint and corrosion can act as insulators, so make sure the grounds are touching clean metal. I would check all of the ground connections on the trailer.

First, check the ground at the trailer tongue. Take the ground loose and clean the connection point on the trailer and the wire end. Next, check the trailers tail lights. Most tail lights are grounded through the mounting bolts to the trailer frame. Make sure the bolt connections are clean and solid. If your trailer lights are grounded by a separate ground wire make sure that wire is attached to a good, clean ground.

expert reply by:
Jameson C

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