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Cadillac Repair/2001 cadillac deville no start

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Expert: - 1/16/2012


Question
i have a 2001 cadillac deville my son got in it and listened to the radio for a while and when he got out the daytime lamps stayed on i put key in on to off to shut them off but would not crank said battery voltage low i took out battery and charged over night reinstalled still no crank and daylite lamps stay on and self leveling pump and now says service theft system any suggestions would be very much appreciative

Answer
Hello,

I am not going to be much help this time, (but I can help some). These cars are not meant to have the key in the on position for an extended time when not running. That is the purpose of accessories for the ignition lock. Your pump, your lights and the theft are all related, so you don't have a theft system problem. I think you might have a module fried, I just don't want to have you or me start guessing.

My first suggestion would be to obtain a factory service manual for the car at http://www.alldata.com for $30 and download it. Not a waste of money because it will come in handy for any repairs to save you money in the future as well.

You will find diagnostic flow charts that will assist you in finding the exact problem and in most cases, you don't have to be a sophisticated technician to locate and fix the problem. It is very possible you have a fried BCM (Body control module). The BCM controls about every function in the vehicle and that is why I lean to it.

Please remember I am limited by the fact I am not at the vehicle and can only go by your description.

For what it is worth, I have seen these situations before where the son listened to the radio for a while with similar results.

Good luck!


Let me know what you find.

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Rob Painter

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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?

Experience

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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