Fried PCM, now have all kinds of issues

Tiny
SKYLARDOG123
  • MEMBER
  • 2004 CHEVROLET 1500
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 210,000 MILES
So I have the truck listed above Silverado, they didn't come with electric fans so I swapped some in and had the eECU tuned to turn them on at temperature about a year ago, the past month or 2, the fans have been shutting off, I assumed the motor burnt up and shuts off when it runs for too long, so I went to wire it up to the ignition fuse, and the wire slipped and landed on the negative terminal and sparked, truck stopped cranking unless I jumped the starter relay. No blinker indicators on dash or outside of vehicle but hazards work fine. A/C clutch doesn't come on, and now the cooling fans dont work. I swapped out the PCM and had it flashed to my VIN and now the truck will finally crank, but the A/C clutch will not turn on and blinkers don't work? Any ideas?
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Sunday, July 18th, 2021 AT 6:46 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

Have you checked fuses related to the A/C and the signals? In addition to checking the fuse, have you confirmed there is power to the fuses?

Here is a link explaining what I mean:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If you look at the attached pic, I highlighted the fuses to check. They are in the fuse box in the vehicle, left side.

Also, there is a flasher module. We will have to check that if the fuses are good and have power.

Let me know what you find.

Take care,

Joe

See pic.
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Sunday, July 18th, 2021 AT 9:49 PM

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