I have 1998 cadillac seville sts. The service auto theft light came on. Now when car is on, electric windows, radio, gas gage and ac will not work.but will work when car is off (acc). Can someone help me. HOw to servie auto theft system or were to find it in my car
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Re: auto theft system
Never seen a deville so cant help,but it sounds like a relay is not being controled by the ECU and to locate this fault need special software and again to reset vehicle .sorry i couldnt tell you more know the fault but without dealer software ??i could only rewire to make it work
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For the backfiring, there is a chemical additive process for cleaning the intake system of Northstar V-8's. This is suppose to be done at a Dealer and the solvent stays inside the engine 8 hours or more. It is rumored to be written as a service procedure in the Owners Manual.
Check your battery. A shorting battery will activate the antitheft system. Try a new fuelpump Relay
You will need to contact Cadillac service at your local dealership. Give them the serial number on the radio. They can then pull the anti theft lock code from their companies archive. The serial number on the radio is typically tied to a VIN, but since you bought just the part, they can't search that way. Hope that helps.