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Originally Posted by AD2BU
Well, I had the no-start issue but now I have a new issue. Like many here, I neede a quick fix and so I just cut the yellow wire to get things going. I went back a few weeks later to try to "fix" it with the resistor and now I can't get the theft light to go off. Basically, the car always starts and the theft light is always on. Since the car always starts, I can't reprogram the system.
I checked voltage coming back on the yellow wire at the BCM and got no voltage. I checked resistance while cranking and got 1.8kOhms. Tried putting a resistor in that was close ~2.2kOhms and the car still starts with the theft light on. Tried reconnecting the yellow wire and the car still starts with the theft light on. The battery is fairly new, so I'm not concerned with a battery replacement problem right now. But, I can't live with a dash light on! I guess maybe I could see a shrink to get over my hangup with idiot lights...
Maybe someone has an idea? I'm thinking the BCM could be bad. Any and all suggestions appreciated. Thank you all.
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It is important to use resistor with resistance value close to the one that you measured, or the Anti-Theft light will still be on. 2.2kOhm is a little far away from 1.8kOhm. You can use multiple resistors in parallel or serial to get the resistance close to 1.8kOhm.
Good Luck!