how do I troubleshoot my1994 3/4 ton vandura conversion van's brake light proble on 1994 GMC Vandura 2500

brake light don't work at all

by in Saint Louis, MO on May 08, 2013
1 answer
ANSWER by on May 08, 2013
First check your brake fuse for open. If o.k. then check your brake switch's power and ground circuits. If they are o.k. make sure the brake switch is adjusted properly. If no power out of brake switch it is probably a bad brake switch. If you have power out of the brake switch, make sure the bulbs and sockets are good and check the circuit from the brake switch to the brake lights.

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