Forum Discussion

cbwallace's avatar
cbwallace
Explorer
Aug 18, 2019

Trailer brakes stop working when headlights are on

My Reflection has developed an issue where the trailer brakes stop working when my headlights are on. In the truck I get a Check Trailer Wiring message. When this occurs the trailer brakes don't work....
jodeb720's avatar
jodeb720
Explorer
Aug 25, 2019
i had a similar problem on my Chevy 2003 2500hd.

There's a flasher control module that went bad and exhibited a similar issue.

When I stepped on my brake lights, the right turn signal didn't work. When the clearance/running lights were on the right turn signal wouldn't flash.

I just replaced the control module and the problem abated.

Just something to think about...

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