2008 Gmc Sierra Trailer Running Lights Work Brake Turn Signals There Seoerate

2008 GMC SIERRA
50,000 MILES
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JOE ENGLAND
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  • 1 POST
My trailer running lights don't work, but the brake and turn signals do. Is there a seoerate fuse for the trailer running lights?
Feb 19, 2013 at 3:52 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Check the trailer park fuse in underhood fuse block, either fuse 25 or fuse 22 depending on litre size of engine. Also, check for voltage at the fuse circuit.

Brown wire terminal F at the trailer connection should be voltage for lamps.
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Feb 19, 2013 at 5:21 PM
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