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Message: <blockquote data-quote="jarance" data-source="post: 73194" data-attributes="member: 21">ahem.. what a power window regulator? Sorry I am not familiar with this term use for a power window. Can you post a picture..As far as I know, a regulator regulate a ripple in an DC voltage. i.e smoothen it. There are various type of regulators. One of the common type of regulator is of course the capacitor. Other more sophicated regulator are transistor or linear IC type..So could you be kind enough to show me your regulator..In the other thread, some people refer a PCM for the air con speed control module as a resistor. I think the resistor is only applied for an E36 because it actually used a resistor to step down the voltage to the motor. For an E46, they use a Power Control Module instead to control the speed of the motor.</blockquote>