1999 GMC Sierra electrical

1999 GMC SIERRA
280,000 MILES
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BIG J TRUCK
  • MEMBER
  • 5 POSTS
Changed heater core in my truck now I lost power to brake lights have running lights. Signals but no brake light when brake pedal is pressed changed the plug at brake pedal to find there is no power there is this due to taking apart the dash I had power before I changed the heater core
Oct 25, 2013 at 4:51 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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MADMIKE1735
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 951 POSTS
this is almost impossible to walk you through online.... something didnt get hooked up along the line here. or a wire is pinched.... did u remove the steering column, or cheat, and let it rest on driver seat? i ask only becuase to remove the column, you need to disconnect 2, or 3 harnesses to the column.... 1 i believe is on the circuit for brake lights. its been a couple years since the last one i done, but i am almost positive this happened to me, and it was a simple fix.... left something unplugged under driver side of the dash.
Oct 25, 2013 at 5:14 PM
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