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Old 03-28-2002, 05:47 PM
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I have worked on a few older GM anti-theft systems in the past. My brother had the resistor in the key type in his 86 Camaro. All that does is measure the key resistor and enable or not enable a relay mounted in the drivers side kick pad. Here is what I did to my wifes car: Go to Radio Shack and buy a magnetic switch used for a door security switch. One half is a magnet, the other half is a magnetic switch. Mount the switch part under the console or behind the dash (the plastic part of course). You wire the magnetic switch to 12V and then to a relay coil. The relay contacts go in series with the coil, computer, pink wire under the dash, whatever. You have to hold the magnet on the right place to get the engine to start. It is just like a system sold in the past called "The Silent System". It also qualified for the insurance discount! This was concidered for the discount because you had to use the magnet and you couldn't defeat it like an ignition kill switch. No fancy bells or whistles but it worked. It also freaked a few people out when you start it, especially if you disguise the magnet so you don't know what it really is. HotRod
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