trailer brake light
#1
trailer brake light
i have a 2013 gmc sierra with a service trailer brake light that comes on at start up.i have replaced the dash switch, the module under truck n had it programmed, light still comes on , now 700.00 dollars later i'm lost, any help?
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CathedralCub (03-16-2024)
#2
Senior Member
True Car Nut
Check for stored codes.
Check wiring at the brake controller module.
Check the trailer connector(*) for corrosion etc.
Check trailer wiring (in the truck) for damage.
Check wiring at the brake controller module.
Check the trailer connector(*) for corrosion etc.
Check trailer wiring (in the truck) for damage.
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