Both my vent windows don't work the voltage only reads for a second at the motor on 1998 Dodge Grand Caravan

I tested motors with meter when I pushed switch the voltage read for a split second is there a relay somewhere that controls them if so where is it or do you think it might be the door switch needs to be replaced. I am stumpte please help me if at all possible thanks.

Asked by for the 1998 Dodge Grand Caravan
Unplug the connecters and test the pins on the motors for continuity. No continuity- open in motor.