1994 Pontiac Grand Am defogger not working

205,000 MILES • 4 CYL • FWD • MANUAL
Avatar
MROX5000
  • MEMBER
  • 1 POST
when i switch to defrost or defogger nothing comes out the top vents by the windshield
Jan 8, 2009 at 1:53 AM
Avatar
2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
you will need to get to the lines at the back of the controller to test this.start car, put selector in defrost,vacuum is not applied to blue hose.Move selectoir to any other position but defrost, vacuum should be applied through the light green hose. If not as described, repair vacuum lines or replace the defrost vacuum actuator or repair as needed
Jan 8, 2009 at 4:10 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.

Frequently Asked Problems for This Vehicle