72 caddy door locks

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Steven Kephart

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Joined: November 06, 2003

Location: Oregon, United States

Posted: February 26, 2007 at 8:56 PM / IP Logged

Hey guys, I have a fun one for you.

I am installing an alarm/keyless in a 1972 Cadillac DeVille. Trying to find the door lock wires (nobody seems to have wiring for vehicles that far back), I pulled the switch out of the drivers door and found 3 wires; a GREEN/ YELLOW, a brown, and a yellow wire. The yellow wire has 12 volts constant, and the other two wires rest at ground and become positive when triggered. I of course thought 5 wire, however when one wire was cut, I got ground on both sides of the wires. So I tried hitting the wire with 12 volts (with a 5 amp fuse on it) which triggered the locks, but blew the fuse.

We decided to call Directechs tech support and they said it was a very high current circuit (30 amps) and to install resettable circuit breakers, otherwise fuses would keep blowing. I will do this, but was hoping someone else had another solution. That one seems like using a band aid on an amputated limb.

Ok, maybe I shouldn't make analogies when watching House MD. Anyone have any ideas?

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customak47

Copper - Posts: 164

Joined: October 25, 2005

Location: Vanuatu

Posted: February 28, 2007 at 8:34 AM / IP Logged

you are running 4 old school door actuators, so you will need at least 20 amps if not more. the circuit breaker setup would be less headache for you because it is a momentary pulse, and if it does trip the circuit, it will auto reset. wire it up for a five wire system, and use a 30 amp circuit breaker on the feed power for your relays. This will work just fine.

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72 caddy door locks

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