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What is the power control modual do - 2000 Jeep Grand Cherokee

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The PCM ( power control module) is the "brain" of the vehicle... think of it as the "central nervous system"

Posted on Apr 01, 2011


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there is actually a modual that runs the lights... the lighting control modual (LCM) not saying this is for sure, but a good place to start. keep in mind if u replace the modual, you have to have it flashed(programmed) to the vehicle.hope this helps and good luck

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A good possibility is the control panel on the driver's door for the power windows and locks. This is called a modual and they are known to corrode inside sometimes due to water that may drip in when the driver's window is cracked open and it's raining out, or snow melting. They are also known to defect after some time too. To see if this is the problem, remove the "modual" from the door panel and unplug the electrical harness from the modual. If the power locks stop cycling, you will have to get a replacement modual from your local GM dealership or possibly your local parts store like NAPA and such fourth. In the mean time, remove fuse number 14 from the fuse box located underneath the hood in the engine compartment on the driver's side behind the windshield washer fluid tank. the fuse is for all the powerlock motors in the vehicle. This will stop the motors from continuing runnig and draining your battery.

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I don't think is the modual control due to the fact if it would be your control modul then it would not open anyway either using your key to unlock. My feeling on this is that either your connection on your alarm is not sending the right voltage to the unit and therefore you are not getting the signal. I would check your connection in your alarm unit and then if that is not the problem, I will replace the modul. Hope it helps!

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