Originally posted by Nic_ContourSE99:
When you unplug the negative while the car is running you might burn your alt. Why?? Because the PCM continously read the vlotage of the battery to adjust the power produce by the alternator. This way you will fool the PCM and have the alt charging at it max and might damage it. You will create a situation an overcharging for your alternator.
Nic.
I also heard that you could fry the PCM with a spike voltage...
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