The panel is off. It does not sound like regulator tooth slipping - not that mechanical, or loud. It's just a click - like an electrical switch or relay trying to click over but not quite able to. And the click is coming from the door, not the console. I feel certain that a new motor would solve the problem - just wondering if there's a cheaper way. I bought a voltmeter today - now I've just got to figure out how to use it.