Power door locks have been around for many year but manufacturers use different wiring schemes.
Power door lock wiring.
One wiring scheme is resistive rest at ground which has been used in the past by various.
This video will show you how to wire relays to control aftermarket door lock actuators.
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To determine what type of door lock switch you are working with follow these three steps.
If there are no external door lock.
On the above a second 3rd or 4th actuator could be wired in parallel to the first one.