Cadillac Repair/car


I have a1999 Cadillac Deville my windows want let down trunk want open ac want come on and the dashbboard information is not showing is it the computer


Chances that the computer is the cause is slim and sound like individual malfunctions. When you say the trunk doesn't open, is that with the remote key fob and or the inside trunk open switch?
I would start with the suggestion, check the multiple fuse boxes for blown fuses. Locations found in the owners manual in the glove box.
You didn't state if these problems all started at once, or if these systems failed over time. This would be very important in the diagnoses.
I don't want to see you wasting money replacing a computer to find out b your problems are not fixed.
The correct and easiest way to diagnose and repair the problems is to use a factory service manual. The diagnostic flow charts are very easy to follow.
You should be able to find one on eBay or Craig's.
You will find this one of best tools to use for future repairs too!
I can't stress the importance to have this documentation because the owner is no longer wasting money replacing perfectly good contents and finding the repairs on a guess just plain did not work.

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Rob Painter


Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?


Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.

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