FUSE FOR THE PCM

2002 CHEVROLET TRAILBLAZER
145,580 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
BOLO1975
  • MEMBER
  • 1 POST
i have a 02 trailblazer, and i am trying to scan my truck for DTC and there is no connection with the scan tool and my truck. so my instruction from the scan tool states that the PCM fuse could be blown. so now the question is where is the fuse for the PCM.


May 3, 2011 at 9:55 PM
Advertisement
Avatar
FACTORYJACK
  • CERTIFIED EXPERT
  • 4,159 POSTS
Does the scan tool not power up? If you had an open PCM fuse, you would more than likely have a vehicle that did not start. You will need to check the cigarette lighter fuse, it is what powers the OBD connector
May 21, 2011 at 3:36 AM
Avatar
DADOMAN6
  • MEMBER
  • 3 POSTS
Computer problem
2002 Chevy Trailblazer 6 cyl Two Wheel Drive Automatic

Taken to several shops to fix problem but,no one knows what is happening.Have replaced several fuses in the ECM module but they keep blowing after a couple or four days.When they blow it empties the computer.so cannot find what the problem is.Help
Jul 14, 2019 at 12:19 PM (Merged)
Advertisement
Avatar
DOCFIXIT
  • CERTIFIED EXPERT
  • 18,828 POSTS
Hi
The fuse that blowes is it PCM B fuse # 10?
Jul 14, 2019 at 12:19 PM (Merged)
Avatar
DADOMAN6
  • MEMBER
  • 3 POSTS
Yes,The fuse that blowes is PCM B fuse # 10?
Jul 14, 2019 at 12:19 PM (Merged)
Avatar
DOCFIXIT
  • CERTIFIED EXPERT
  • 18,828 POSTS
Fuse powers up fuel pump relay and pump. Need amp draw checked to fuel pump. Pump maybe drawing excessive amps blowing fuse. Othe possibility is faulty PCM.
Jul 14, 2019 at 12:19 PM (Merged)
Avatar
DADOMAN6
  • MEMBER
  • 3 POSTS
Took 2002 trailblazer to Chevy dealer and they found corroded wiring causing a short to blow the ECM fuses .Also The Cam Modulator was bad. All the info I have right now.Do you know what that means?
Jul 14, 2019 at 12:19 PM (Merged)