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Cadillac Repair/fan not working
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Question
On my cateria the fan used to stay on after the car was shut off and now its not working what may be wrong.
Hello,
This is a very general question for something that needs a specific answer.
The simple check would make sure the fuse for the blower is good. You need to check your owner's manual for exact locations of fuse boxes and where the fuse would be located.
From your description, I would suspect the possibility of two other problems. Cadillac for close to 25 years has used a resistor module that was known to fail. A bad module would cause the fan to keep running when the car is shut off, sometimes enough to kill the battery for the next morning. Very expensive!!! Years ago, in the Eldos and Sevilles, the module cost $300-$400 bucks just for the part!
It could be the motor finally self destructed internally as well.
If it is not a fuse, I am afraid you will need to take the car to a repair shop. Don't go to Cadillac and get double gouged! Many larger auto service centers are capable of diagnosing your problem.
Things are no longer simple. There are many computers and printed circuit boards that can fail.
What would really suck is a bad printed circuit board on the heater blower module causing the blower motor to be bad now from running as much as it did.
I wish you the best.
Rob
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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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