Brake lights

1997 GMC SONOMA
150,000 MILES
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JONATHAN WILLIAMS
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  • 2 POSTS
I have power going in and coming out of the pedal switch. I have turn signals but no brake lights. I unplugged the harness under the hood and checked power there and none. I checked the ground on the pedal switch and it is good. Is there a relay other than the signal or what else could it be?
Jul 13, 2016 at 1:50 PM
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WRENCHTECH
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Is your third (high mount) brake light working? If so, you likely have a bad turn signal switch.
Jul 13, 2016 at 2:33 PM
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JONATHAN WILLIAMS
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No brake lights anywhere. By turn signal switch do you mean the multi function?
Jul 13, 2016 at 2:35 PM
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WRENCHTECH
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Yes, I do but that only feeds the two lower lights. Make sure it is not just a bulb in the high mount.
Jul 13, 2016 at 2:36 PM
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JONATHAN WILLIAMS
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Okay, the truck is gone for a while but as soon as it gets back I will check that. If it is not the multi-function what could possibly be my other options?
Jul 14, 2016 at 4:45 AM
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WRENCHTECH
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Then you are going to have to follow a wiring diagram and test the circuit.
Jul 14, 2016 at 9:58 AM