Trailer Brake Lights Not Working, All Other Lights Work

Updated 10/05/2015 | Published 10/03/2015

Question:

i have turn signal lights , parking lights but no brake lights. on trailer. tested wire harness under truck everything works except brakes. there is brake lights on the truck

asked by: Rick

Expert Reply:

it sounds like you have a blown stop light or trailer brake light fuse. The tow package wiring on a vehicle is separate from the tail light wiring so it makes sense that the truck brake lights are working. Since you have isolated the issue as being on the truck side a blown fuse is the likely culprit.

expert reply by: Michael H