Brake lights not working properly

Tiny
RICHARD A VERGARA
  • MEMBER
  • 2009 CHEVROLET EXPRESS
  • 4.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 153,000 MILES
My brakes lights do not work if the key is not on the on position.
Saturday, December 16th, 2017 AT 6:47 AM

1 Reply

Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
I do not think they are supposed to work without the key on run, because the "BRK SW" fuse is not hot unless the run/crank relay is energized.
The run/crank relay gets its power from the ignition switch when the key is on only run and start.
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Saturday, December 16th, 2017 AT 6:59 AM

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