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2003 deville, no heat, no fan, fan motor is good, have 12…

2003 deville, no heat, no...
2003 deville, no heat, no fan, fan motor is good, have 12 volts at fan motor plug, all the lights work on heat panel, all responed to prompts but no fan thus no heat or A/c
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Answered in 5 minutes by:
1/18/2018
Dan
Dan, Technician
Category: Cadillac
Satisfied Customers: 25,797
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Verified

Hello, my name is ***** ***** I'm here to help get your problem solved.

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How do you know fan motor is good? Thanks.

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Customer reply replied 4 months ago
removed from vehicle and feed it 12 volts, powered up freely with no noises

This would most likely mean the blower motor control processor has failed then, I would go ahead and replace. At processor the red wire should have power and black wire should have ground. If both are good then replace, let me know if you have questions, thanks.

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Customer reply replied 4 months ago
3 wires, blue black and bare ground, ground and blur turn the motor, 12 volts at blue and ground with test light

Here is replacement instructions for processor.

-

https://www.dropbox.com/s/uq2m8t8ziz1q6ez/bmcp.pdf?dl=0

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Customer reply replied 4 months ago
where is the processor located? I am an old Mercedes whrench
Customer reply replied 4 months ago
the car is mine, i have it at my shop at home, I will get back with you Thanks Pete

Here is another picture to help locate, let me know if you run into questions. THanks.

-

https://www.dropbox.com/s/9iy4iz5028zqpfu/proc.pdf?dl=0

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Customer reply replied 4 months ago
ordered the part from Rockauto, it will be a couple of days before I get it. I will let you know. Thanks

Sounds good, thanks.

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Customer reply replied 4 months ago
How do I remove the IP compartment? Looked at it last night, is there a trick?
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Customer reply replied 4 months ago
nothing in the file, could not open
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Customer reply replied 4 months ago
got it, thanks I will keep you posted

Sounds good, thanks.

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Customer reply replied 4 months ago
still waiting for parts

No problem, let me know how it goes when it comes in. Thanks.

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Customer reply replied 4 months ago
part came in today, try it tonight

Sounds good, let me know how it goes. Thanks.

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Customer reply replied 4 months ago
works like it should, Thanks, ***** ***** very helpful Pete

Good to hear, thanks for update. Please do not forget to rate answer.

Dan
Dan, Technician
Category: Cadillac
Satisfied Customers: 25,797
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Dan
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Category: Cadillac
Satisfied Customers: 25,797
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