Question about 2005 Chevrolet Silverado
You may have the polarity backwards on the tow brake control unit. Or should I say on the lines coming out of it.
Check your polarity with a multimeter and see whats what.
Have you had to fix or replace any other light fixtures on your truck? These might also be worth checking for polarity flips.
Be sure to check your power supply from the truck to the control unit and be sure you arent wired for power in series instead of parallel.
Oh...and if this problem just occured out of the blue...suspect the tow brake control is faulty. Go to your trailer supply store and borrow one to test.
Good luck and be careful!
Posted on Dec 11, 2009
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Posted on Jan 02, 2017
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