Power locks don't work

[Tom Christiansen]

Hi,

>I have a problem with the power locks in my father's '92 100. They
>just don't work.. I have tried the pump/control unit in another car,
>it worked just fine. The same unit controls the interior lights, which
>work in the 100.. But the power lock pump never runs. I can try the
>driver's door, passenger door or tailgate, but it doesn't work. I can
>hear the microswitch in the locks click, I even tried jumpering a wire
>in the connector to "simulate" locked or unlocked, still dead..

Well... Did you measure if the pump gets any voltage when you try to lock
the doors? Does the pump work?

It would be unlikely that all door switches fail at the same time (I assume
you've tried locking the car from more than one door). Therefore, if the
controller works, I'd suspect the pump, wiring to the pump, or the ground
connection to the pump. I doubt the pump draws much current so it probably
does not have its own fuse (but that's my guess).

Tom