Power Lock Motor: Operation

The driver side front door power lock motor is controlled by a unique driver unlock relay output of the Central Timer Module (CTM), while the remaining power lock motors are all connected in parallel and share common CTM lock and unlock relay outputs. The driver side front door power lock motor also shares the common lock relay output from the CTM. A positive and negative battery connection to the two power lock motor terminals will cause the power lock motor plunger to move in one direction. Reversing the current through these same two connections will cause the power lock motor plunger to move in the opposite direction. The power lock motors and circuits can be tested using conventional diagnostic tools and methods.