2004 Other GMC Models GMC WT 4500

2004 GMC
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WETNECK1
  • MEMBER
  • 1 POST
Electrical problem
2004 Other GMC Models 4 cyl Two Wheel Drive Automatic 147k miles

same vehicle as isuzu npr, this work truck at first lost headlights, then turn signals, then lost brake lights.
checked fuses all seem ok so not sure where to start, any suggestions ?

i DID find a relay in the dash that was unplugged but reinserting didnt do anything/help.
Jul 24, 2009 at 8:10 PM
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MICKEY-D
  • ✓ASE Certified Mechanic
  • 304 POSTS
  • ASE Certified Mechanic
You need to check your harnesses up tp the steering column to the switch for the head lights and turn signals. The brake lights also run through the same switch. Chances are the switch is bad.
Jan 11, 2010 at 10:37 PM
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