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Originally Posted by HUMTECH
Spark plug wire? I doubt it. Maybe an ignition feed? which would be A 12v supply with key in on position. Ignition power. Not battery power which is A 12v feed all the time. Or go to your gm dealer and give them this parts number 12370445. Just went and got that from our parts dept.
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I checked and it is using the spark plug wire to determine if the engine is actually running. the lights wont come on with just the key being in the run position, then need to know the engine is functioning. (apparently)
How would I do that with diesel? Or a work around.