Electrical Door lock security issues

You have to wire in 2 additional relays because the ford system reverses polarity on the wires to lock and unlock. All the ford systems work the same pre 94 with power locks. Try googling it on the interwebs. Might find it under adding keyless entry to 92 crown vic.

I've done a lot of keyless entry and alarm systems on all types of ford's. Can't remember how the two relays got wired because it's been over 20 years. I've spent those 20 years ripping the alarms out of Fords and putting them back to factory. There will be 4 added failure points that could cause your door locks to not work. In a couple years the remote, alarm brain, relays, or wiring connections will fail.

Now, I only install kill switches and horn triggers from the accessory wire, dome lights, and under hood pressure switch. Very easy and reliable without the added failure points.

My favorite are the trackers from Amazon. I like to catch the thief, not scare him away. This way they learn their lesson.