Mechanics

BLOWER MOTOR DOESNT FUNCTION

1997 Cadillac Deville • 145,000 miles

COMFORT FUSE GOOD. A/C COMPRESSOR ENGAGES. ABLE TO SELECT TEMP RANGE UP AND DOWN BUT NO BLOWER MOTOR FAN CAN BE FELT EVEN WHEN DISPLAY SHOWS AUTO OR MANUAL LOW OR HIGH.
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97CADDY
January 11, 2012.



Power the blower motor direct from the battery and see what happens

Rasmataz
Jan 11, 2012.
You can power it directly and nothing will happen. It relies on a digital speed signal from the A/C programmer, that comes in on the little gray wire. More than likely, you need a blower motor. Very seldom, in fact never, have I seen a failed programmer cause a lack of blower operation. Check that you do have power and ground at the blower, with a test light across the connectors large wires(red/black). If you have a light across that circuit, replace the blower motor.
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Factoryjack
Jan 12, 2012.
Try to direct wire the motor if no check the voltage to the motor if none. Youll need to remove the blower motor wire it goes to a module in the a/c case replace that blower module.

Cadieman
Jan 12, 2012.

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