Question about 2006 Chevrolet Cobalt

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BCM Replace/install aftermarket stereo trouble

So I decided to go ahead and do my first stereo install. I already had the neccessary GM harness, it was from a 06 chevy silverado, i just had to make a minor physical adjustment and repin it. I am putting in a flipscreen h/u stacked with a dvd player. Well i had everything connected and just needed to connect the ignition/switched (red) wire. I went to the fuse box under the dash and connected the wire to the wiper blade fuse. Everything turned on and worked perfect. Well that was a test to see if i could get the connections right. As i was moving it, the red wire touched something and sparked. The radio turned off and i turned the car off right away. I reinstalled the factory headunit and it worked so I assumed all was well and that I learned the mistake of leaving wire connections exposed. Well that was last night and this morning after leaving my girls house, i go to turn the wheel and i have no power steering. I notice the DIC says "service airbag" and only the theft deterent light appears on the gauge. wipers dont work, passenger airbag light does not turn on, cant change ac temp, output, i can only turn it on. Now I know I screwed up. now i notice that on the compartment fuse box, the wiper, airbag, eps and one other fuse have no power going to them. I take the fuses out and put them in other slots that have power going through them and they all work. I took all the connections off the fuse box and took it out and saw that it has GM# 15867055. So I know that the fuses do work but its where the fuses go. Now my questions are, "Is the black fuse board the BCM or is the BCM elsewhere?" and "Can i replace that part since I do have the part #?" and "If i do replace the part is it simply plug-n-play?" Any help towards this is appreciated. I am located in LA County, CA.

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  • 4 more comments 
  • cruznboi65 May 28, 2009

    Is there a way that i can check to see which one it is. I notice that there are two big black fuses for the wiper and im not sure how to check to see if they are good. I have that voltage reader thing...(im not sure of its exact name...LoL)...to check if there is a current going through. Should i put pos on fuse insert and then neg on ground?

  • cruznboi65 May 28, 2009

    I dont understand what the fuseable links are and where they are located? I have looked at both fuse boxes under the hood and under the dash and have tried to familiarize myself with all the components.

  • cruznboi65 May 28, 2009

    So i connect one end to the positive post and the other i try in each fuse input that does not work, so for instance like wipers and airbag fuses? And then what do i look for? The accessory to turn on or what exactly? I am sorry if i seem repetitive. I like to understnad why things work or do not work, not just simply the solution. is there literature on this possibly at a county library?

  • cruznboi65 May 28, 2009

    I will definitely try this. I had the last two days off from work and was trying to get this all done by today but then i "screwed up." So if i find a burnt fusible link, do i replace it and how? When i check the fuses and the accessory does not work, turn on, run, etc what do i do then? do i need to replace the body control module? do i need to follow the wires from under the dash to under the hood and check if any burnt? I would really like to figure this out then have to send it to the dealer and dish out money needed elsewhere. thats why i was doing the install myself in the firstplace..LoL. And to say that i fixed it "on my own" and that i can do it.

  • cruznboi65 May 29, 2009

    So i used the taillight bulb wire and the fuse box under the hood has power going to the fuses. i checked all of them. only the fuses in question under the dash do not have power going to them the rest do. i did not have enough time to check thoroughly for the fuselinks.

  • cruznboi65 Jun 04, 2009

    So i hooked up a hot wire from the battery post under the hood to the fuse spot for the wipers and all the warning lights came back on. My passenger airbag was working properly, my ac turns on, the wipers work, and i have power steering. The only thing that is still troulbe is that when i turn the wipers off they stop right at that spot and I cannot control the ac recirculation. everything else works. My presumption is that there is no power going from the fuse box under the hood to that specific part of the bcm. all the devices in question have the same plugin on the fuse box under the hood and the bcm. I am using the wire with the inine fuse on it for now to for a temp fix but i make sure i unplug it everytime so i do not drain the battery since it is hot constantly.

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  • Chevrolet Master
  • 1,889 Answers

You have burned out your large box fuses under the hood and, possibly a fuseable link or, two check them
next time connect the hot/red wire only to an inline properly rated fuse connected to the battery positive lug
the library or, a dealer will have your car's schematic
And use wirenuts to connect wires not crimp connectors

Posted on May 28, 2009

  • 2 more comments 
  • Jim Goldsmith
    Jim Goldsmith May 28, 2009

    It's called a multimeter

    Big fuses work the same as small ones just use a testlight (power)or a meter on continuity (no power) to check them

    A fusible link is just a smaller wire molded in the middle of a larger wire usually located on or, near the positive battery post

    another way to check fast is use a small wire #18 guage about 20 feet long with an inline fuse in it: attach one end to the positive battery post and, use the other end to power accessories

    This makes work go quick in my auto electric shop

  • Jim Goldsmith
    Jim Goldsmith May 28, 2009

    a fusible link is just a larger wire with a small 2" to 3" long somewhat different but, similar colored wire molded in near the end of the wire they are used in the body harness as a fuse they discolor and, become very flexible when they burn they are usually found near the starter or, the battery

    when you check with a test wire remove the fuse and, touch each side of the fuse recepticle the device the fuse operates should work,run,turn on etc. don't worry about asking again and, again I'm here to help and, I am very patient

    Rember the only dumb question is the one not asked





  • Jim Goldsmith
    Jim Goldsmith May 28, 2009

    excellent attitude! ok[ go to the dealer or, to: the library get the schematic

    To replace a fuseable link just cut out the bad part of the wire and wire nut in a splice wire 2/3rds smaller

    when the accessory does not work or; burns out the inline test fuse leave the body control module alone they usually do not fail

    get a test light or taillight socket and bulb wire it into the test wire then look for a broken wire to that non-functioning device or, in the case of a burnout fuse a short the damage you have done is minimal it just takes time to troubleshoot write down the status of each device you test so you don't forget

  • Jim Goldsmith
    Jim Goldsmith May 29, 2009

    power the dead circuits then troubleshoot

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