fuses are good but not workin - Pontiac G6 Forum
 
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post #1 of 11 (permalink) Old 01-18-2012, 02:43 PM Thread Starter
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fuses are good but not workin

windows,wipers, locks, interior light, brake and turning lights are not working and i checkd the fuses of all of them but they are good?? what can it be? somebody help me!!!!
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post #2 of 11 (permalink) Old 01-18-2012, 03:04 PM
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I'm pretty sure all those things are control by the BCM. It's located in the center part of the dash where all the fuses are, You can try this. Disconnect the battery, Go to the BCM and disconnect all of the large plugs that go into it, and try to clean them, once all clean and dry plug it all back in and reconnect the battery. Hopefully that'll fix it, if not you may need a new BCM...
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post #3 of 11 (permalink) Old 01-18-2012, 03:27 PM Thread Starter
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is it the blue one? how does it look like?
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post #4 of 11 (permalink) Old 01-18-2012, 03:40 PM
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yea it's a large blue plug i believe, there should be a lever on it that you need to release before it'll let u unplug the connector, Make sure u disconnect the battery though!
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post #5 of 11 (permalink) Old 01-18-2012, 03:40 PM Thread Starter
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i think i founf the problem, one of the fuses labeld ibcm is blown
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post #6 of 11 (permalink) Old 01-18-2012, 03:41 PM
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Quote:
Originally Posted by ivan89 View Post
windows,wipers, locks, interior light, brake and turning lights are not working and i checkd the fuses of all of them but they are good?? what can it be? somebody help me!!!!
That's a lot of systems to all fail at once. It that a complete list or are there more?

Can you still start the engine?

Had anything been done to the car just prior to the onset of all these failures?



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post #7 of 11 (permalink) Old 01-18-2012, 03:44 PM
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Quote:
Originally Posted by ivan89 View Post
i think i founf the problem, one of the fuses labeld ibcm is blown
Can you give us the fuse number?



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post #8 of 11 (permalink) Old 01-18-2012, 03:45 PM
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Well if the fuse labeled IBCM is blown then your BCM is pretty much not working and therefore none of that stuff may work, But I'm pretty sure if the BCM isn't working then you probably wouldn't be able to start the car, Because I'm fairly certain it goes through the security checks within the BCM before it allows the engine to start...
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post #9 of 11 (permalink) Old 01-18-2012, 06:39 PM
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The OP is referring to one of the B+ inputs to the BCM. There are three B+ inputs, IIRC. It's very likely that an power output wire from the BCM has been grounded somewhere before getting to it's destination. That often, though not always, will fry part of the BCM itself. Since the BCM has more than one source of B+, the part that isn't affected continues to function normally. The source of the output grounding needs to be found first. Then determine if the BCM got damaged. If something was done to that vehicle before this happened likely that led to the output grounding. Could also have been a mouse chewing on a 5v reference wire which is now touching ground.



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post #10 of 11 (permalink) Old 01-19-2012, 09:29 AM
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A 5 volt reference wire would not blow a fuse, it would kill the circuit until the short was removed.
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post #11 of 11 (permalink) Old 01-19-2012, 02:17 PM
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A 5 volt reference wire would not blow a fuse, it would kill the circuit until the short was removed.
You're right. Thought better about that after posting but forgot to correct it.



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