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Re: relcalcitrant lock knob 200 90

posted by  someone claiming to be Richard A. Montgomery on  Fri Jun 29 12:06 CST 2001 [RELATED]

Paul,

I had the same problem, and found this in the archives. The part about the thermistors fixed mine.

>Another factoid for you: The locks are actuated by small motors. The motors have thermistors in them to protect the motor from overheating. (This can happen if you're driving down the road on a warm day, window down, arm out, resting on & pushing down the button for 15 minutes. The motors can't take the current for that long without overheating. The thermistor gets warm and limits the current.)

The thermistor is a small disc about the size of a penny, and is inserted between two clips inside the motor. Each face is silver coated, and after years the coating gets tarnished and won't conduct current -- so the lock motor fails. You can clean the silver coatings by (gently) scrubbing with a pencil eraser. Avoid fingerprints or other contamination when reinserting the thermistor.

When reassembling the motor, be sure to install the rack and gears properly -- otherwise the motor will act backwards. (You only have two choices -- right or wrong.) -->

good luck.





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