2009 GMC Sierra electrical

2009 GMC SIERRA
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MIKE1685
  • MEMBER
  • 1 POST
on my gmc texas edition when i press on my brakes my blinkers light up like my stop lights only when my lights are off though why is this happening?
Nov 25, 2014 at 5:16 PM
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CARADIODOC
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 34,308 POSTS
First check if there's a trailer harness that has gotten chewed up and two wires are touching.

A broken ground wire can cause this symptom too, but most commonly that is also related to a trailer harness that was spliced in with mechanical connectors that don't seal out moisture.
Nov 25, 2014 at 6:14 PM
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