this is from
http://www.the12volt.com/doorlocks/page3.asp#5w
and shows how to wire an alarm into a 5 wire lock system. notice how the pink & green wires are cut and hooked up to contacts "87a & 30" those contacts are closed allowing the wire to remain
"rest at ground". when the alarm triggers the relay, then it switches to contacts "87 & 30" are closed sending 12 volts to the actuator. this is what breaks the
"rest at ground" and allows it to lock or unlock without causing a dead short. this is why i said you need 4 wires so you can send and return from the alarm. i ran mine from the left side because there is a
master switch and a
slave switch on the door locks. the
master switch (mine is on the left door but that is not always the case) is what brings the wires to
"rest at ground" when nothing is happening. i know it is confuzzling. i goofffffed around on mine for days thinking how to do it and even after seeing this diagram, i was still confuzzled. trace the wires closely and you'll be able to finger it out.
also, my alarm directions said it has relays built into it but it would not operate the locks without blowing a fuse after about 4 tries. i wired in the relays exactly as shown here and used the alarm to operate these relays. keep in mind, not all relays are the same. make sure you have the
"87a" connector on it (87a & 30 are a closed circuit when the relay coil is at rest with 87 & 30 being closed with coil operating this makes connector 87a the common connector).
to confirm you have the correct wire before cutting it, shave back some insulation and ground your test light on a cofirmed ground source then touch the test probe on the wire and hit the door lock or unlock and your test light should come on only when you push the switch in question.
as for a constant 12 volt source, i ran 2 new lines from the battery fused at 20 amps. 1 for the alarm and 1 for the new door lock relays. having it seperate means that if the door lock relays blow a fuse you still have a funtioning alarm.
keep smilin...........we are almost there.......we ARE having fun!!!!!!!