Door Module: Description and Operation

DOOR MODULES POWER AND GROUND

In order to control window operations, as well as other door functions, door modules must be powered up. Battery voltage is supplied by the rear fuse block, through separate circuits, to each door module. Each door module is separately grounded through a ground stake. Additionally, the door modules use these power and ground supplies to provide voltage and ground to their associated window switch, and to provide voltage and ground for door lock operations. The front door modules also use these power and ground supplies to power the window express up sensors, and for outside rearview mirror operation.

Door modules battery voltage is supplied as follows:
- The DDM battery voltage circuit is fed by the DRVR MDL 10 amp fuse in the rear fuse block.
- The PDM battery voltage circuit is fed by the PASS MDL 10 amp fuse in the rear fuse block.
- The LRDM and RRDM also have separate battery voltage circuits to power them up, but these circuits are fed by the same EXPORT LTG/PWR LK 15 amp fuse located in the rear fuse block.
- The DDSA receives battery voltage, through the DDM, from the DRVR MDL 10 amp fuse in the rear fuse block. The DDSA is grounded, through the DDM, to a ground stake.

These circuits are in the C3 harness connector of each door module and must not be confused with the battery voltage and ground circuits that are used exclusively to drive the power window motors. For more information concerning the window motor power and ground circuits, see the following paragraph titled Window Motors Power and Ground.