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Low Voltage Problem - 2001 Monte Carlo SS


Redfox340

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Guys, getting a problem with the parents 2001 Monte Carlo SS that I cannot track down.

Battery and alternator are pumping out correct amperage and voltage.

However instrument cluster shows less than 8 volts present.

All door lights, headlights, radio, instrument cluster, and alarm are adversely affected.

It seems like low-voltage issues, but the battery CLEARLY shows ~12.9v from a multimeter test.

 

Any details on what the low voltage problem for the car's electronics can be? :think:

 

- Erik

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Not sure if its the same, but in the Trailblazers and others of that platform, but when the gauge cluster goes bad, it will show low voltage on the dash

I thought this initially too but he says the interior lights, etc. are affected. I've normally found it to be a crappy ground issue.

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I've normally found it to be a crappy ground issue.

Been through the grounds inside the engine bay with no success.

I'm up for any and all ideas of what it could be.

 

- Erik

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Solution Found: FAILED engine control unit (ECU).

Cracked board and some bad soder points...

Replaced for new ECU and car start and runs excellent.

 

- Erik

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Solution Found: FAILED engine control unit (ECU).

Cracked board and some bad soder points...

Replaced for new ECU and car start and runs excellent.

 

- Erik

 

Would've been one of the last places I'd have looked. Don't really see too many PCM

caused issues.

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