How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dave Nova Your Own Question
Dave Nova
Dave Nova, Cadillac Technician
Category: Cadillac
Satisfied Customers: 1522
Experience:  ASE Master Certification. GM World Class Certification
11042942
Type Your Cadillac Question Here...
Dave Nova is online now
A new question is answered every 9 seconds

Cadillac Deville's Heater Blower Not Working.

Customer Question

My 1997 Cadillac Deville Concours heater blower is not working.
The coolant level is full and the thermostat seems to be functioning.
I bought a replacement blower motor and the mechanic plugged wiring harness into new motor before removing old motor. He informed me that the new one would not come on.
Submitted: 3 months ago.
Category: Cadillac
Expert:  david craig replied 3 months ago.
Hi Im David,
Did the mechanic check the fuse and relay? D
id he check for power at the blower motor connector before he wasted your money on a new motor?
Did he check the condition of the blower motor resistor assembly?
Customer: replied 3 months ago.
He had power at plug on old motor
Expert:  david craig replied 3 months ago.

ok. then replace the resistor assembly

Expert:  david craig replied 3 months ago.

did he check for a good ground at the connector for the motor?

Customer: replied 3 months ago.
He plugged in the new unit to see if the motor is the problem. He said it didn't come on
Expert:  david craig replied 3 months ago.

but he had power at the connector. so the next step is to replace the blower motor resistor

Customer: replied 3 months ago.
Where is the resister assembly located
Expert:  david craig replied 3 months ago.

ill get you a diagram, but its located very close to the blower motor

Expert:  david craig replied 3 months ago.

the front blower motor resistor is incorporated into the blower motor, so the problem is the blower motor switch. the rear blower motor has a separate resistor.

Customer: replied 3 months ago.
I should go ahead and install new motor?
Expert:  david craig replied 3 months ago.

if he said he plugged the new one in and it didnt work...then no. replace the blower motor switch.

Customer: replied 3 months ago.
Ok that is located where?
Customer: replied 3 months ago.
Oh ok I see it on the diagram.
Expert:  david craig replied 3 months ago.

its actually part of the climate control panel. thats where the signal is sent from to the blower motor

Customer: replied 3 months ago.
in the dash?
Customer: replied 3 months ago.
How do I replace blower control switch?
Expert:  david craig replied 3 months ago.

I believe you need to replace the entire climate control panel. the switch is not serviceable by itself.