I puzzled over how to install this keyless entry system for a few weeks until I saw SLCFJ62's post on power window and lock fixes using relays. A tip of the hat to SLCFJ62 and his excellent writeup as it made adding the keyless entry unit a lot easier.
https://forum.ih8mud.com/60-series-wa...anent-fix.html
Once the relays are installed per the above post, the double pole switching of power and ground to the door lock actuators are done by the relays and we can simply hook up the door lock switch and the keyless entry module to work in parallel so either can put 12V to the coil side of the lock and unlock relays.
The keyless entry module I used was a Clarion K20. I am under the impression after looking at a few that most keyless entry modules have the same wires so this should work for other units. The wiring diagram looked like this:
https://forum.ih8mud.com/60-series-wa...anent-fix.html
Once the relays are installed per the above post, the double pole switching of power and ground to the door lock actuators are done by the relays and we can simply hook up the door lock switch and the keyless entry module to work in parallel so either can put 12V to the coil side of the lock and unlock relays.
The keyless entry module I used was a Clarion K20. I am under the impression after looking at a few that most keyless entry modules have the same wires so this should work for other units. The wiring diagram looked like this: