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Thread: How to: Fix our BCM

  1. #11
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    Quote Originally Posted by ANGRY BIRD View Post
    So drop some solder on the dot?
    and or resolder whats there yes. once you heat it up it will get become liquid again.

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    Ok guys i'm failing to see anything wrong with my BCM





    I tried my 99 Firebird BCM in it, didn't fix the problem. Everything that normally works still worked with it.

    Intermittent passenger window,and radio. They only work when they are BOTH working. I have yet to see the driver window work under any condition.
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    I found the bad joint with a magnifying glass, but I tried to heat it up with my soldering iron and it didn't work
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    Quote Originally Posted by ANGRY BIRD View Post
    I found the bad joint with a magnifying glass, but I tried to heat it up with my soldering iron and it didn't work
    you might have to get some solder put more solder on it. they use some high temp solder than a standard 10w or 15w soldering iron can heat. the solder will heat the old solder up and mix them. plus solder can only be reheated so many times till it loses its ability to re heat.

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    Well my friend came over and did it. Passenger window and radio are back, but no driver window
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    Default Re: How to: Fix our BCM

    Its a good start! You had the driver door apart?

    2002 35th Anniversary Camaro
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    yeah yesterday
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    Default Re: How to: Fix our BCM

    Hmm. I imagine you know what your doing, but gotta start somewhere in diagnosing the issue. You've tested the switch, motor, wiring? Is there a short somewhere? Bad ground

    Idk if its the same window motors but the ones in 02-05ish silverados and avalanches suck, and aftermarket ones are worse. The ones in my dads 04 avalanche crapped out. Had them replaced with non GM replacements, and now not only the front windows don't work, but he has no lights on his drivers door, no sound from the door speaker, no heated seat indicators.

    This may be completely irrelevant but its insight. Hope you get it figured out

    2002 35th Anniversary Camaro
    SLP CAI&Lid, filter, and ZZP baffle delete
    32/19 WS6 Sway bars w/ poly bushings, BMR STB
    C5 Y2K wheels WS6 hood. Full LED swap

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    Haven't tested the motor yet, but it doesn't make a peep. I remembered when the one in the bird went out it made a whining noise still.
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    I thought I would add something that I discovered with having another Camaro.

    You CAN swap another BCM from another car, BUT you will lose your key-fob.

    Why?

    I looked up programming the BCM on AllData at work.

    When the BCM is originally installed, it reads the resistance of the resistor on the key during the first "key-on" cycle and programs itself to that key.

    This can only be done ONCE.

    So your only real option if you want EVERYTHING to still work normal is repair the BCM that came in the car originally, or a brand new un-programmed BCM all together.

    That said, I will have to get off my lazy ass and actually fix my original to get my FOB back.

    I put the BCM from my 2000 Camaro into my 1999, the part number on the case was the same. The only difference I found was diagrams of the connectors, on the 1999 pin C15 is "Low Coolant Indicator Latching"?, on the 2000 C15 is "unused". It hasn't seemed to affect my car.
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