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Cadillac Repair/1993 Cadillac Deville

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Question
Replaced the starter couple of days ago and yesterday the car would not start after running fine all day. A passer by said to turn the ignition on and put the car in gear then back into park. Try to start it. It worked!! Of course every time I try to start it I go through the same thing again. What do think the problem is?

Answer
Hi Sherry,

My first question would be; why was the starter replaced in the first place?
Being that the engine ran all day may have nothing to do with your problem.
Obviously, it is impossible to diagnose a problem over the internet, but something you said struch a note.
Moving the transmission selector as well as tilting the wheel affect the wiring in the steering column.
Your car is equipped with VATS (Vehicle Anti-Theft System). This is a owner problem more thant it slows theft. The system has a resistor pellet (often referred to as computer chip-not) embedded in the key blade. There are two very small wires (similar to telephone wiring) that run down through the steering column. Because so small, they commonly break inside the steering column. If these wires break, the vehicle's computer will not see the proper resistance in the circuit from the proper ignition key. Moving steering column components puts these broken wires together again and the engine will start.
The most common complaint with this junk factory-installed system was "Engine starts at times".
Here are your options if this is the problem: Have the dealer rip you for $300 to repace the ignition lock assembly. Have the automotive locksmith replace the ignition assembly for $150.
Have the ignition lock wiring harness repaired (not worth it, because problem will happen again.)
There is another option, however, it puts you in a bad situation if your car gets stolen and you have insurance. These idiots actually believe the car is "unstealble" with this antiquated problematic system.
Have a mechanic measure the resistance of the key blade. Go to Radio shack and find a resistor value within 10%. Have the harness from the steering column cut and install the resistor in line. This lies to the computer so it sees the proper key each time.
You can also go to an auto alarm store and request a VATS bypass kit. This kit comes with every alarm capable of remote start. Have the correct resistor installed in line.
As I write this, I have a case where the insurance company hired a VATS expert that will explain the design of this system. I, on the other hand address the real issues as to the problems with this system.

If you do bypass the system, at least get a hidden starter disable. Something a thief does not have access to.
If your car is stolen and you have comprehensive insurance, I can almost guranty they will deny your claim and even go farther sometimes by habving you charged criminally. Does this happen? All the time!

The VATS problem is very common and is most likely the problem with your car.

Good Luck

Rob

Cadillac Repair

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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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