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Question
96 Fltwod blower fan won't stop even with the key out unless i pull the fuse. onboard HVAC code is 02-26. fan runs on high and i have no control of fan speed. ALL other functions work fine
Hello,
Cadillac has certain inherent problems and this is one of them. They have had this problem with the blower since the $80s and never seemed to fix it. I do not deal in codes, but just the symptom associated with either the blower running til the battery goes dead or not running at all.
The most common problem I ran across was a failed resistance module. It is not servicable and can only be replaced. Very, very costly at Cadillac--over $500!!!!
I have seen many of these Cadillacs with this problem over the years.
Many came into my shop with the slip shod fix, but it works. The only problem is that you will have only high blower. You could make different blower speeds with different switches, but that is a real pain in the butt.
Commonly, I say the resistor module bypassed by inserting a toggle under the dash leading directly to the blower.
I would suggest installing a toggle under the dash. Catch ignition switch power at the steering column. Insert a 20 amp fuse and run a wire to the blower motor. This way if you forget to flip the toggle, you won't have a dead battery.
I would not recommend this fix to a newr car, but if you replace the module for $500+, its just going to fail again.
Good Luck!
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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