No high beams...

1999 GMC SAFARI
205,000 MILES • 6 CYL • AWD • AUTOMATIC
Avatar
NFJACOBS
  • MEMBER
  • 1 POST
I have a 99 GMC Safari AWD, I just replaced the headlight bulbs. One problem, the lights do not come on when I turn the light switch to the 3 position, the lights are on in the first and second position, also the high beams do not come on and the indicator light for the high beams does not come on. Is there a fuse issue or something else?
Jan 31, 2011 at 9:38 AM
Advertisement
Avatar
JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
I looked at you headlamp switch, I'm not sure what you mean by third position? Usually if the low beams work and the high-beam doesn't, I suspect the dimmer switch. In the diagram below, lite green wire is voltage for high beam, black is ground. For the low beam, tan wire is voltage and again, black is ground. Use a voltage tester, on high beam voltage circuit, headlamp on high.
Image (Click to enlarge)
Attached Media
Jan 31, 2011 at 10:29 AM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle