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Turn Signal and Brake Light Circuits Not Working on Factory Installed 7-Way on 2012 Ford F-250  


Hello I have a 2012 F-350 crew cab with factory 7 way trailer hook up. The problem that Im having is that I have power to connection 12v which is running lights, but no power to the left/right turn signals or brake lights, I have checked all fuses they seem to be fine?


Helpful Expert Reply:

Some vehicles use both fuses AND relays for the tow package wiring. You will need to check the vehicles owners manual for your 2012 Ford F-350 to find the locations of all fuses/relays related to the tow package wiring.

To check for a bad relay, the easiest thing to do is to use a known good relay in place of a possible bad one. If the function starts working then you know that was the problem. Relays could be obtained from an auto parts store or from your local Ford dealer.

I have included a couple of additional links to the right that could also help.

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