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Old 12-02-2010, 03:22 PM   #1
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Default ICM Connector - Bare wires - problems?

Hi All,

I am in the process of putting the 1993 LeSabre back together. During disassembly I discovered the connector for the ignition control module had some bare wires and appeared to have the insulation charred.

I have cleaned it up and taken a photo which is attached. I plan to scrap this connector and replace with one I have from the salvage yard (re-soldering each of the 13 wires).

However, my question is: What may have caused this and how might this have affected drivability? (I also am replacing the upper intake manifold as this was leaking coolant into the intake so needless to say the car was not running smoothly to start with (particularly a rough idle).

Thanks for any help and suggestions!
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Old 12-02-2010, 03:23 PM   #2
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Here is the photo of the wiring:
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ICM Connector - Bare wires - problems?-dscf3104.jpg  
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Old 12-02-2010, 04:33 PM   #3
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Was there a lot of tension on those wires when it was installed?
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Old 12-02-2010, 05:12 PM   #4
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Great picture!!!!!!!!!!!!!!

Do those wires have just oil on them or crispy , as in burnt ?
Could be intentional !
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Old 12-02-2010, 06:01 PM   #5
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They look oily and crispy lol......question is how did it get oily like that.......anyways it could have affected driveablility because the two wires furthest to right apear to be touching...not good...any bare touching wires is not good
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Old 12-02-2010, 06:08 PM   #6
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Just by the fact that all of the stripped wires are on one side of the connector, I would say that there was too much tension on the wires.
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Old 12-03-2010, 01:29 AM   #7
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Not only do the ICM wires control your coils and ignition, but they also transmit data from the cam and crank sensors. If your engine was stalling a lot or your tach was flaky, congratulations -- here'* the culprit.
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Old 12-03-2010, 02:41 AM   #8
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When I took the connector off the there was no tension that I noticed. The wires at first didn't look bare but after removed the grime it was evident. The underside of the ICM module seems to have a crispy burnt coating but I see nothing else around that area that would indicate high temperatures. Who knows, maybe it was intentional...It was like what you get burning insulation off a wire with an open flame, it flaked right off. At least two of the wires look as though they could easily have been touching. Could arcing cause they charred wires or is the current to low?
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Old 12-03-2010, 07:44 AM   #9
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My first thought seeing that is heat.
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Old 12-03-2010, 08:01 AM   #10
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Doesn't look like high heat to me. Looks like a lot of oil grim, and perhaps solvents and a little heat degraded the wires isolation. Only some of the isolation is missing, but nothing else is damaged.
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