Mechanics

GMC SIERRA AUTO PARTS PROBLEM

1999 GMC Sierra • 200,000 miles

Can you show me brake light wiring harness diagram for a 1999 GMC k1500 4 wheel drive 5.7
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Guest
March 2, 2013.



This is about the best I can do as they are really small. The white wires are power going to t/s switch and overhead cab brake light then it's yellow and green for tailgihts from t/s switch. Also check at rear of frame for ground for all lights they get rusty, dirty and loose contact. Try that first. Also ther eis a circuit board that goes bad in tailights that is available at auto parts


Hmac300
Mar 2, 2013.