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Cadillac Repair/BCM on 95 Caddy Eldorado

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Expert: - 2/1/2009


Question
Ok, im gonna try to explain this the best as possible. The car is a 95 Cadillac Eldorado. And my problem is that for one, i have 2 undo my battery every time i plan on letting the car sit for more than say 5-8 hours. The next problem is that when i do reconnect the battery,i get in and start the car up and apply the brake to shift. When i push on the brake all the gauge needles start swinging back and forth really fast, then the dash lights dim and it dies. The dealership in my town said it was BCM. What is that and where is it located in my model. thanx

Answer
Hi Mickey,

The BCM is body control module.

Don't screw around with a dealer. No matter what, you will pay too much. There are service centers out there that can do the same diagnoses and repairs for half the cost.

I do not know where the BCM is mounted exactly in your car. I can tell you that it is either under the dash or in one of the kick panels.

The BCM controls most of the electronic functions in your vehicle.

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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