Question about 1991 Chevrolet C1500

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1991 Chevrolet K1500, 350. No brake lights. Fuse is good. There is power to the fuse. Bulbs are good. All other lights work. Not sure if there is power to the stop lamp switch. Where does the power come from? Is there anything in the steering column that affects brake lights. Thanks.

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Sounds like either the brake light switch is faulty or out of adjustment. See if there is power to one side of the brake light switch with a 12v tester, if so, see if the brake pedal depresses the button when moved, if not adjust it, if so, see if power is on the other side of the switch when brake pedal is depressed. If no power, bad switch. If no power to either side of the switch, then trace the wire and see what the problem is or run a new hot wire.

Posted on Sep 03, 2010

  • Jay Cooney Nov 07, 2010

    If your tail lights, brake lights, or reverse lights on this series of GM trucks quit working, you need to replace the tail light socket (the part held in place with 2 screws that has all the bulbs in it). These GM trucks are notorious for these to quit working. Mine started acting up when a back up light quit working. I pulled it out to check the bulb and it started working again. Then it quit working completely and no matter how much I wiggled the wires it wouldn't come back on.

    So then my tail light quit working on the opposite side one day shortly thereafter. When I pulled it out it started working and I had tail lights, but not the stop or turn light.. It drove me nuts because the bulbs were good, and i had power in the wire. It had to be the circuitry in that socket.

    I went to autozone and picked up the left socket assembly for $30. Problem solved for the left side. I decided to get one for the right side too. Viola!!! Now all the lights work like they are supposed to. Later on someone told me these lights for that series of (88-98) pickups were notorious for causing 99% of the lighting problems back there.

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