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Expert: - 9/7/2009


Question
About a week ago my sercurity light came on after my car wld cut off at stop signs. I took it to my mechanic and they unlossened a screw and now it dosent cut off anymore. Since then when i start my car up it idles real high then drops down as i start to drive but the sercurity light stays on and the service engine light also stays on. Please help me im in an nightmare with this!!!!!!!!!!!

Answer
Hello,

You did not specify the year or model of this Cadillac. I have no clue as to what your mechanic did. If done properly, he would have scanned the vehicle's computer system to see what faults caused the service engine and security lights to come on before doing any adjustments. My guess is that he reset the idle which just masks the real problems with the vehicle. You need to take the vehicle into a reputable repair shop that has the proper diagnostic scanners that will detect your problems. You don't have to go to a dealer. You can go to stores like Sears, Firestone, Good Year and others. They will be able to determine what exactly is wrong with the car.


Good Luck!

Rob

Cadillac Repair

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Rob Painter

Expertise

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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