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98 C5 wiring problem/air bag question

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Old Apr 19, 2011 | 01:04 AM
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Default 98 C5 wiring problem/air bag question

I recently purchased a 1998 C5 that was put through a barbed wire fence, the whole front end body was torn off. The car will fire and idle like a champ, but it won't run over idle speed. Part of the problem is that the computer(mounted in the passenger fender) was torn off and the wires cleanly cut. I soldered the wires back together matching color to color. The black box that is mounted next to the computer also mostly torn off. I resorted to soldering those wires together also. But, I am down to 9 wires still coming out of the main harness and 5 wires coming out of the black box, none of these colors match. I'm thinking that this may be part of the throttle problem being it is a electronic throttle. Both air bags also blew, I am curious if there is a sensor in the car that it will not run over idle speed until the air bags are replaced?
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Old Apr 19, 2011 | 08:07 AM
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Originally Posted by snoracer56
I recently purchased a 1998 C5 that was put through a barbed wire fence, the whole front end body was torn off. The car will fire and idle like a champ, but it won't run over idle speed. Part of the problem is that the computer(mounted in the passenger fender) was torn off and the wires cleanly cut. I soldered the wires back together matching color to color. The black box that is mounted next to the computer also mostly torn off. I resorted to soldering those wires together also. But, I am down to 9 wires still coming out of the main harness and 5 wires coming out of the black box, none of these colors match. I'm thinking that this may be part of the throttle problem being it is a electronic throttle. Both air bags also blew, I am curious if there is a sensor in the car that it will not run over idle speed until the air bags are replaced?
Any time you have situation where a wiring harness is literally torn off, you have a potential for stretched wires in the loom. The insulation looks fine, but the copper can be fractured. The only way to be sure, is ohm out every single wire.

Also, just soldering the wires together, based purely on color, won't fly. Just because the wire color is the same, doesn't not mean it's connected to the same device.

Last edited by lucky131969; Apr 19, 2011 at 08:12 AM.
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Old Apr 19, 2011 | 09:12 AM
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Do you have the original ECM and BCM still in the car or were those replaced? Sounds like the 2 mph security is getting you.

Last edited by dougbfresh; Apr 19, 2011 at 03:22 PM.
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Old Apr 19, 2011 | 01:09 PM
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The throttle positioning wires are broken near the ECM, I am curious if the trans am and GTO wiring harnesses are the same as the corvette?

Last edited by snoracer56; Apr 21, 2011 at 03:51 PM.
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