FUSE FOR THE PCM

Tiny
BOLO1975
  • MEMBER
  • 2002 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 145,580 MILES
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.


Tuesday, May 3rd, 2011 AT 9:55 PM

6 Replies

Tiny
FACTORYJACK
  • MECHANIC
  • 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
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Saturday, May 21st, 2011 AT 3:36 AM
Tiny
DADOMAN6
  • MEMBER
  • 3 POSTS
  • 2002 CHEVROLET TRAILBLAZER
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
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Sunday, July 14th, 2019 AT 12:19 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
The fuse that blowes is it PCM B fuse # 10?
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Sunday, July 14th, 2019 AT 12:19 PM (Merged)
Tiny
DADOMAN6
  • MEMBER
  • 3 POSTS
Yes, The fuse that blowes is PCM B fuse # 10?
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Sunday, July 14th, 2019 AT 12:19 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 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.
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Sunday, July 14th, 2019 AT 12:19 PM (Merged)
Tiny
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?
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Sunday, July 14th, 2019 AT 12:19 PM (Merged)

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