Question about 1991 GMC Sierra

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Brake lights dont work, replaced switch, checked for power, power to switch, power to fuse, checked wiring to back end, all appears to be good, put power to white wire, no brake lights still, i need some help please, anything i can check, does someone know were to find a wiring diagram, should i check the direction switch, thank you

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You hit it on the nail, you have check every thing we would have checked here at my repair shop, it's going to be the turn signal switch, as you now the brake light circuit run's through it and more then likely your center top brake light works.Bad switch (turn signal).

Posted on Jul 07, 2010

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