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Full battery no power in the cab. It's like there is no

Customer Question
Full battery no power...

Full battery no power in the cab

Mechanic's Assistant: Is the power loss consistent, or does it fluctuate?

It's like there is no battery

Mechanic's Assistant: What year is your Cab?

2012 chevy colorado

Mechanic's Assistant: Are you fixing your Cab yourself? What have you tried so far?

Tried to jump it off. checked the battery with a volt meter but there is no power inside the truck

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Iv'e got power in the fuse box by the battery just not in the cab

Submitted: 8 months ago.Category: Chevy
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Answered in 1 minute by:
9/25/2017
Chevy Mechanic: Jerry Newton, Chevy Technician replied 8 months ago
Jerry Newton
Jerry Newton, Chevy Technician
Category: Chevy
Satisfied Customers: 5,638
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
Verified

There is no power at the fuse box in the cabin? At any of the fuses?

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Customer reply replied 8 months ago
the fuse box shows power. coming in a going out
Customer reply replied 8 months ago
no more money so just type it in
Chevy Mechanic: Jerry Newton, Chevy Technician replied 8 months ago

With the key on, take a test light and just touch the top of each fuse. There are two tiny metal tabs on each fuse top, touch each one with the test light and make note of which ones don't have power on them, and let me know what they are.

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Customer reply replied 8 months ago
every fuse shows power i turned the key on.no power in the cab head light wont turn on nothing turns on
Customer reply replied 8 months ago
are you there
Chevy Mechanic: Jerry Newton, Chevy Technician replied 8 months ago

I am, bear with me as I am helping multiple people at once. Let me look at some schematics and come back to you.

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Customer reply replied 8 months ago
okay thank you
Chevy Mechanic: Jerry Newton, Chevy Technician replied 8 months ago

No headlamps is a good clue. The body control module controls the headlamps, as well as just about everything else in one way or another. I would have a scan tool on this to see if I could communicate with BCM, from the sounds of it, I would say your BCM is faulty, or has no power, or something like that. I would definitely start by looking in the direction of the BCM, though, and attack this as a headlight issue. If you can get the headlights to work, you can probably get everything else to work, and the headlights are a pretty simple circuit to work out. The BCM is simply in control of them, and apparently the BCM is not working.

A good first step is a hard reset. Disconnect both battery cables, and touch the cable ends together for a few seconds. Then, reconnect and see if the situation has changed. If it's still the same, you're going to need a good scan tool, at the very least.

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Customer reply replied 8 months ago
i will give it a try and get back to you
Chevy Mechanic: Jerry Newton, Chevy Technician replied 8 months ago

OK, let me know if you need anything else.

Please take the time to rate my answers, that's how I get compensated. If you have further questions, I am happy to follow up with you.

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