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Thread: Please Help - Security Light ??
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10-10-2008 #1
okay... yesterday i got a little more information. i was set to hard-wire a resistor into the wiring to do the popular bypass mod.
for clarification, the ECU sends a wire up the steering column, through the resistor on the key, and back down the column to the ECU. the resistor value must match what the ECU expects or else the security light goes on and can't start the car for 10 minutes.
but.... turns out, if i just disconnect that circuit, car still behaves the same. resistor value, no resistance, or open circuit does not matter.... car runs with security light on. if i test the resistance through the wires that go through the key, it is an open circuit; i have read that sometimes a wire breaks up in the cylinder lock. i suspect that the VATS system went bad, and the PO bypassed it downstream - maybe wired the fuel pump directly to ignition?
i suppose i could get the security light to go out if i still hardwire a resistor in there. i tried the resistor value in the key, but that did not work - maybe the key is a replacement, and that's why the system was bypassed downstream. then i wired a potentiometer and tried all 15 resistor values, but none of them work. perhaps each attempt requires a 10 minute wait. is there any way to determine what resistor value is required for the ECU to turn out the light?
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