I just bought a used 2005 Dodge Ram 1500 with a Karr alarm. Only the drivers door had a lock actuator, installed by Karr I assume.
I decided to put an actuator in the passenger door for convenience. The actuator I used has 2 wires and operates by switching polarity for up or down(unlock/lock) I then went looking for the wires that operated the drivers door, assuming that I could just connect the pass. door lock actuator in parrallel. Wrong!
(Whoever did the installation of this system needs to be beaten and his wounds doused with vinegar.)
wiring in parallel ( red+green wires) just stopped the drivers actuator from working..
Can anyone supply a comprehensive schematic of the Karr system, and provide me with the necessary connections.
I do surely appreciate it. It will save me much brain overheating.
Charlie Crensing@sprynet.com
I think (but I'm not sure) Karr is a shop out of California, that has/had alarms badged with their name.
I have a used Karr alarm, and to me, it looks exactly like Audiovox.
If you just tapped into the small red and green wires coming out of the alarm brain...........well, hopefully if you just did it once or twice, the alarm's outputs didn't burn out.
After you disconnected it, did the driver's door start working again? Hopefully so.
Anyway, those outputs from the alarm are (most likely) low-current, and they're going to trigger a pair of relays somewhere in the car.
Operate the one good doorlock back and forth, while listening. You should be able to hear the relays clicking, and figure out where the installer put them.
From those relays, there should be a pair of heavier wires running into the driver's door.
You should be able to tap yoru second actuator's wires into those wires going into the door, and be fine.
Make a temporary connection at first, and see if your actuator is going up and down the right way. If it's backwards, just reverse the wires.