1976 GMC Sierra running lights ect.

Tiny
JACOBG
  • MEMBER
  • 1976 GMC SIERRA
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 18,000 MILES
Well I have a 76 gmc 4wheel drive and I just encounterd some electrical probloms. All of a sudden none of my running lights are workin but my head lights work. I have replaced all fuses so it isent that but my running lights should come on when I turn on my light. Got any ideas of what it could be?
Thursday, October 7th, 2010 AT 7:57 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you check wiring--bulb sockets at the rear. Brown wire is voltage for tail lamps, black wire is ground. If no voltage on brown wire, at the rear, with headlamp switch on, then you need to check the brown wire at the head lamp switch for voltage. Could be faulty switch or problem with the wiring circuit somewhere.
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Friday, October 8th, 2010 AT 12:16 PM

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