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Dan
Dan, Technician
Category: Cadillac
Satisfied Customers: 23591
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Cadillac Escalade EXT: 2005 Cadillac Escalade fan will not

Customer Question

2005 Cadillac Escalade fan will not blow on any speed
Submitted: 1 year ago.
Category: Cadillac
Expert:  Dan replied 1 year ago.
Hello, my name is ***** ***** I'm here to help get your problem solved. This usually means the blower motor control module has failed. Check the Gray/Black at the blower motor module located at the blower motor, for a 5 V square wave with a change in frequency for variable blower motor speeds. Grounding the Gray/Black should cause the blower motor to run on high speed. Jumper the blower motor to B+ and ground. Verify the blower motor does not pull more than 15 amps of current. If grounding the Gray/Black does not run the blower motor replace the Blower motor module. Here are replacement instructions, let me know how it goes or if you have more questions. Thanks.
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https://www.dropbox.com/s/rxpvgeofttrcy3k/bmm.pdf?dl=0
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