I just bought a 96 Cadillac Seville STS. The seller said all it needed was a new battery and to have the computer reset. I replaced the battery and it cranked up but it died after a few seconds. Then a mechanic told me that I needed to replace the ignition switch and key because a wire inside was broken. I had that replaced and the car started and ran great, other than the Theft Problem Message. And no radio, AC, fuel or temp gauge ect. When I got it home I started it up multiple times in the driveway. But it still had the message saying " Theft System Problem. " so put the key in accessory position and I waited awhile.I was told to wait 10 mins. While waiting the radio came on and the AC lights were on but no air blowing and the fuel and trunk switches worked. Weird. I read that unhooking the battery for an hour would reset the computer so I tried that but now it started doing the same thing as before. Shutting down after a few seconds and won't run. Its very strange that some things start working then they stop working. I also tried to get codes by holding the off and warmer up but got nothing.
I bought the car at a large auction that has onsite mechanics. They first offered to deactivate the security system. I mentioned that I read online that the key switch may be the problem. They checked it and said that the wire was broken. He said he would go to a local GM dealer and get a new cylinder and key. After an hour or hour 1/2 he called me and said that the car was working, he had installed a new cylinder but that I would need to have the computer re-programed still. Everyone there was very helpful and seemed trustworthy but I was wondering if he installed the incorrect key/cylinder. Maybe the wrong pass key resistance. Not sure. Still not working today and no lights on the center console either. Just flashing on gear indicators and same message Theft System Problem Car May Not Start. I wouldn't mind just bypassing or deactivating the theft system. If its not to difficult.
how do I reset the computer?. Please help.I need to get this car working.
have the same problem?
Thursday, April 17th, 2008 AT 9:59 AM