1999 Pontiac Grand Prix test port

1999 PONTIAC GRAND PRIX
120,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
RONGP
  • MEMBER
  • 3 POSTS
have a service engine soon light come on, and when i went to have it scanned they said that my test port was dead! is there a fuse or something i need to check?
Nov 17, 2009 at 9:36 AM
Advertisement
Avatar
MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
Yes the ALDL (assembly line diagnostic link) is a fused circuit.

Look at inside fuse box for ALDL or diagnostic fuse.
Nov 19, 2009 at 12:27 AM
Avatar
RONGP
  • MEMBER
  • 3 POSTS
the test port is linked with the cigarette lighter fuse.
Nov 21, 2009 at 6:48 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