Would not start, when it did start all the gauges were not working

SILVESTER ROCKY ZAVALA

MEMBER
2004 GMC YUKON
5.3L
V8
2WD
AUTOMATIC
290,000 MILES

My SUV listed above (XL model) recently didn't want to start. But it did, but all my gauges were not working window, door locks A/C blowing hot air, radio none of them were working. I drove it home like that. Battery light turn on when I turn my SUV off and on again, also the ABS. Some say it could be my BCM. I don't know.

Rocky

7 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

The first thing that needs to be done is the battery tested.

https://www.2carpros.com/articles/car-battery-load-test

Then the charging system needs to be checked. Low voltage is the main cause of all the issues you have.

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

Has anyone tested anything?

Roy

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Thursday, September 5th, 2019 AT 6:31 AM

RKY1

MEMBER
3 POSTS

Yes. They tested my alternator first it was good. Then they tested my battery and it came up that it was no good 2 1/2 years old. Replaced it with new battery started right up with everything working. My question is, why would the battery make everything not work? Just want to know.

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Thursday, September 5th, 2019 AT 11:10 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

Low voltage. If the battery is bad, it cannot provide the needed power to all the accessories for it to work correctly.

Roy

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Thursday, September 5th, 2019 AT 11:20 AM

RKY1

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3 POSTS

Okay. My question is, when the car is running isn't the alternator giving all the power it needs to run all the accessories for it to work correctly? Not the battery. Isn't the battery just to start up?

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Thursday, September 5th, 2019 AT 12:13 PM

ASEMASTER6371