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Q: door lock motors humming,

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If I move the manual slide in just the right position , not necessarily full up or down, I can get the motors to stop. None of the switches will lock or unlock the doors. I drove the car, passenger door started humming. Stopped put in Park, shifted into drive, humming stopped momentarily. Duplicated 2 more times. Stopped adjusted manual slide to stop humming, drove on with no noise. Parked car . Opened and shut drivers door OK. Opened and shut left rear door-humming started in that door. Opened right rear door and adjusted slide on left door until humming stopped. Shut right rear door-OK, Opened and shut passengers door -OK

My car has 160000 miles.
My car has an automatic transmission.

Hi there. It is very possible that the power door lock switch itself is damaged or an electrical relay is damaged, which causes a open electrical current to continually run the power lock motor. However, it could be a short in the motor itself. I would highly recommend having a professional mobile mechanic come to your location and complete a power door locks are not working inspection; which will allow them to inspect your Cadillac and pinpoint the source of your issue.

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