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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....
beemerphile1's avatar
beemerphile1
Explorer
Aug 18, 2019
I agree about it probably being a ground issue. Did you test the resistance from the ground wire in the umbilical and the frame?

Look underneath and check/clean/reattach all the ground connections on the frame.

How about the truck side? Is it grounded to the frame somewhere in the rear?

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