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George H.
George H., ASE Certified Technician
Category: Chevy
Satisfied Customers: 18818
Experience:  GM Tech ASE Master Tech 15+ years
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I have a 2005 Tahoe. ac will not blow air in the front. rear

Customer Question

i have a 2005 Tahoe. ac will not blow air in the front. rear system fine. I checked the blower motor- motor is ok. I replaced the blower motor resistor - that was ok/made no difference. the compressor will load when the control is switched on. just no air blowing.
Submitted: 2 years ago.
Category: Chevy
Expert:  George H. replied 2 years ago.

Hello I will help you with your question,

Were any of the resistor connector pins melted or burnt?

Did you run the motor with direct power and ground applied?

Do you have a voltmeter to check the circuit if I guide you?

Customer: replied 2 years ago.
no burnt pins.
yes, I ran the motor with direct power.
I do have a volt meter.
Expert:  George H. replied 2 years ago.

Great, first start with the orange and red wires if you have the 7 pin resistor and see if you have 12 volts in the high speed position between the red and black then the orange and black.

If you have the 5 pin it is a transistor not a resistor and you check from the red to the black then the purple/white wire for a changing voltage as you change the blower speed. Key on for either test.

Let me know what you find and which system you have

Thank you