2001 Convertible A4 Engine Computer Harness Repair HELP!!!!
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7th Gear
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2001 Convertible A4 Engine Computer Harness Repair HELP!!!!
I just bought a 2001 Corvette Convertible A4. I bought it at a salvage auction in Texas. My dad is a dealer. The car has damage to the right front. The Computer was ripped off along with the connections for the wiring harness. I have a wiring diagram that tells me what each wire is for but a lot of the wires are the same colors. How can I tell the difference between them?
Le Mans Master
Joined: Nov 2005
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I just bought a 2001 Corvette Convertible A4. I bought it at a salvage auction in Texas. My dad is a dealer. The car has damage to the right front. The Computer was ripped off along with the connections for the wiring harness. I have a wiring diagram that tells me what each wire is for but a lot of the wires are the same colors. How can I tell the difference between them?
Melting Slicks
Joined: Oct 2007
Posts: 2,383
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From: Kinston North Carolina
I just bought a 2001 Corvette Convertible A4. I bought it at a salvage auction in Texas. My dad is a dealer. The car has damage to the right front. The Computer was ripped off along with the connections for the wiring harness. I have a wiring diagram that tells me what each wire is for but a lot of the wires are the same colors. How can I tell the difference between them?
Tech Contributor
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From: Dyer, IN
If the PCM and connectors were ripped away, I would not trust the integrity of the balance of the harness. Even wires that appear to be intact may have stretched, and the wire broken inside. I would purchase a new(or used) PCM and wiring harness for this car.
Good luck, in a collision like this, it will be an electrical nightmare.
Thread Starter
7th Gear
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What is a DMM? I don't know a lot about electrical stuff. I should clarify that the actual connectors were NOT ripped off, they were damaged and about 1/3 of the wires were ripped out of the connectors. I would like to get a new or used harness but they seem to be very hard to come by. Anyone know where I could get a used harness? Does it matter what year, transmission, coupe, conv. zo6, etc.? What would a used one cost versus a new one. Thanks for your help
Last edited by tc02vette; Aug 14, 2009 at 07:37 PM.
Tech Contributor
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From: Dyer, IN
What is a DMM? I don't know a lot about electrical stuff. I should clarify that the actual connectors were NOT ripped off, they were damaged and about 1/3 of the wires were ripped out of the connectors. I would like to get a new or used harness but they seem to be very hard to come by. Anyone know where I could get a used harness? Does it matter what year, transmission, coupe, conv. zo6, etc.? What would a used one cost versus a new one. Thanks for your help
A DMM is a digital multimeter. If you do not know a lot about electrical stuff, you might consider parting out, or selling this car as is. Vettes in front end collisions (especially the PCM/TAC side) are just bound to be a hornets nest.
Thread Starter
7th Gear
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Guess I'll have to bite the bullet and get a new harness from the dealer
I've waited too long for another corvette and I'm not going to let this one go. It has every option you can think of and its torch red with a black top. Thanks
I've waited too long for another corvette and I'm not going to let this one go. It has every option you can think of and its torch red with a black top. Thanks
Safety Car
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It would help to post some pics. It is not clear if the module was "ripped off" by a very hard passenger side hit. Or was it "ripped off" by someone who stole it and clipped the wires cleanly for you to work with.
Someone correct me if I'm wrong but if he buys a new harness from the dealer it means rewiring most of the car with new wires??? Maybe get a quote from the dealer to simply change the PCM and let them figure out the wires.
Someone correct me if I'm wrong but if he buys a new harness from the dealer it means rewiring most of the car with new wires??? Maybe get a quote from the dealer to simply change the PCM and let them figure out the wires.
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Melting Slicks
Joined: Oct 2007
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From: Kinston North Carolina
Disregarding physical damage, the wiring should not be an impossible job. My opinion is you need to recruit some help, needs to be someone who knows and understands Multimeters and Schematics. Take a look at this little project, it a 3800 Engine, 440-T4 Transmissiom, from a full size Oldsmobile, going into a 1988 Fiero GT. It's just a hobby of mine.
Every wire you see to the ECM (and then some) had to be rewired to make the engine run as original, and make all the Fiero instruments work. Yes, I know the C5 electronics are a lot more complicated than a 1988 Fiero, but tracing wires, splicing and repairing is still the same, when done correctly.
Every wire you see to the ECM (and then some) had to be rewired to make the engine run as original, and make all the Fiero instruments work. Yes, I know the C5 electronics are a lot more complicated than a 1988 Fiero, but tracing wires, splicing and repairing is still the same, when done correctly.
Le Mans Master
Joined: Nov 2005
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What is a DMM? I don't know a lot about electrical stuff. I should clarify that the actual connectors were NOT ripped off, they were damaged and about 1/3 of the wires were ripped out of the connectors. I would like to get a new or used harness but they seem to be very hard to come by. Anyone know where I could get a used harness? Does it matter what year, transmission, coupe, conv. zo6, etc.? What would a used one cost versus a new one. Thanks for your help
Thread Starter
7th Gear
Joined: May 2008
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The wires were clipped off clean. There is about a foot of wire coming out of the car. What do you think a shop would charge to figure out the wiring because I really don't want to do it. Plus, I'M COLOR BLIND!!! I have a plug off a different gm vehicle that I have rewired so that all the wires are in the same place as the plug that came off the car. The computer part# is 12200411 which happens to be the same as a lot of other gm vehicles. I know the colors on their harness will be different but as long as they're in the right spot they should be able to figure it out by looking at the wiring diagram that they gave me. So the plug I have rewired will plug into the new computer I ordered. I just need someone to match up the wires. Any ideas on cost at $65/HR?
I have a plug off a different gm vehicle that I have rewired so that all the wires are in the same place as the plug that came off the car. The computer part# is 12200411 which happens to be the same as a lot of other gm vehicles. I know the colors on their harness will be different but as long as they're in the right spot they should be able to figure it out by looking at the wiring diagram that they gave me. So the plug I have rewired will plug into the new computer I ordered. I just need someone to match up the wires. Any ideas on cost at $65/HR?
Last edited by tc02vette; Aug 15, 2009 at 03:44 PM.
Tech Contributor
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From: Dyer, IN
Not exactly. If you have a bundle of wires, and four of them are dark blue , and all the same gauge, how do you know what system they are associated with just by looking at the schematic? You will have to use a DMM to isolate, and appropriately mark each wire so they can be reterminated to the correct connector.
Melting Slicks
Joined: Oct 2007
Posts: 2,383
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From: Kinston North Carolina
Not exactly. If you have a bundle of wires, and four of them are dark blue , and all the same gauge, how do you know what system they are associated with just by looking at the schematic? You will have to use a DMM to isolate, and appropriately mark each wire so they can be reterminated to the correct connector.
Race Director
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From: West Norriton PA
St. Jude Donor '08
Tech Contributor
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From: Dyer, IN
Whose they? $65/hr is cheap by today's standards. Would they have the correct tools? You tell me. No info in your sig....perhaps there is a local forum member who can help you out, or at least make a recommendation on a shop you can trust to do the work.
Race Director
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From: West Norriton PA
St. Jude Donor '08
You're looking at thousands of dollars of work, if it can even be done.
There are approximately 160 wires, 80 on each of the PCM harnesses. You have no idea of how complicated the task is that need s to be done.
More like a $100 an hour + supplies. It would probably take weeks to sort out the mess
There are approximately 160 wires, 80 on each of the PCM harnesses. You have no idea of how complicated the task is that need s to be done.
More like a $100 an hour + supplies. It would probably take weeks to sort out the mess
Safety Car
Joined: Mar 2007
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Wasn't there a thread about a guy changing out an early PCM for a newer one? He took every wire out of the stock connector and replaced them into the new connector. Might look for that to see the pics and maybe contact that forum member for tips on doing it?? Thought for sure it was on this forum, may be on the other one?
Tech Contributor
Joined: Jan 2007
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From: Dyer, IN
Wasn't there a thread about a guy changing out an early PCM for a newer one? He took every wire out of the stock connector and replaced them into the new connector. Might look for that to see the pics and maybe contact that forum member for tips on doing it?? Thought for sure it was on this forum, may be on the other one?
http://forums.corvetteforum.com/c5-t...-corvette.html
Race Director
Joined: May 2005
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From: West Norriton PA
St. Jude Donor '08
And his wire ends were not ripped out and he labeled each wire before dis-assembly and then replaced them based on the pin code assignments.
You're missing all of the pins and you have no idea of where the wires belong.
Yes, and he is a seasoned aviation electronics tech:
http://forums.corvetteforum.com/c5-t...-corvette.html
http://forums.corvetteforum.com/c5-t...-corvette.html