Here s a power door lock wiring diagram for a 2009 chevrolet malibu.
Power door lock relay wiring.
Find the door lock relay.
Using a mechanical latching relay like the pcb latching relay pictured here you can use a single negative output to alternately lock and unlock the doors.
Using a pair of needle nose pliers pull out the old relay.
Locate the door lock relay.
That s where most wire breaks occur.
Should you need to add relays for a 3 wire negative type b door lock system just change both normally open terminals 87 from 12v to ground.
For those located under the dash in the middle of the cab behind the stereo.
Here s how a body control module power door lock system works.
The mechanical latching relay only requires it s coil to be momentarily energized to change and maintain the opening or closing of it s contacts.
If the relay and switch are working properly but you re not getting power and ground at the door lock actuator check the wiring harness in the hinge area of the door.