Power door locks have been around for many year but manufacturers use different wiring schemes.
Power door lock wiring.
Locate the harness plugged directly into the back of the door lock switch.
On the above a second 3rd or 4th actuator could be wired in parallel to the first one.
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To determine what type of door lock switch you are working with follow these three steps.
Next with your multi meter probe each of the wires in this harness and write down the.
This video will show you how to wire relays to control aftermarket door lock actuators.