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89 cadillac eldorado (FWD) bought car with legitimate title with lost key. Have tried to get help from GM and local dealer. Have tried different resistances in key switch circuit to no avail. Once the anti-theft system is activated is it necessary to reset the BCM for this system? If not what is your fix for the lost key situation? I have a replacement tumbler set with new key, but no resistor in key. Thanks for the help.
Answer -
You stated: Have tried to get help from GM and local dealer.
What did they tell you ?.
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I was told that there were no records available that went back to 1989. Local dealer said same thing. Local locksmith told me about trying to find the correct resistance for the circuit. I have inserted a 20K ohm potentiometer in the ignition circuit and have tried various resistance values from 100 ohms to 5K ohms and the anti theft is still engaged and still disables the starting system.
AnswerI have anti-theft electrical schematics and test procedures that I can provide you with.
However, You will need to contact me at:
onlineautohelp@msn.com
In order for me to provide you pictures and procedures to fix your problem.
NOTE: This website is NOT mine and I am only a VOLUNTEER helping answer BASIC simple questions to those in need and this website does not allow pictures to be sent and or received.
Please include all of the information, MAKE, YEAR, MODEL, and all necessary other information that you previously provided as well as the information that I just gave you when you contact me.
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