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Originally Posted by usmctopgun
They actually had to replace the ignition switch right after I got it, because it was causing the whole thing to act up. When the switch went bad, the hummer would start off in second gear, and not shift into fourth. Not sure how an ingnition switch should affect the transmission, but it did.
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There is a 22 awg white wire (2nd ignition) that supplies power to the transmission controller when the ignition is turned on. If the ignition was not making contact with that wire you would have shifting problems like starting in 2nd gear and not shifting into other gears.
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Originally Posted by mdoyle
sometimes the shift position indicator remains lit and the red battery light stays on when I take the key out.
If I don't reinsert the key and take it out with those lights off, then the battery is dead the next morning. The Dealer said it need an "adjustment" but didn't fix it when it was in for air suspension work.
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There is no adjustment that i know of for this problem. The problem you are having is that your ignition switch is actually still making contact to that 22 awg white wire and keeping the 2nd ignition hot. I have had run into problems like this when i was installing remote starter systems into GM trucks.