FUSE FOR THE PCM

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.

6 Replies

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

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)

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)

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)

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.