AUTOMATIC CLIMATE CONTROL PROBLEM

1977 Cadillac Brougham

Tiny

vega88

October, 20, 2010 AT 11:09 PM

Air Conditioning problem
1977 Cadillac Brougham V8 Two Wheel Drive Automatic 133000 miles

for some reason my automatic climate control device wont work, when I turn the car on, I dont hear the fan kicking in. The only function that works is the defrost function, everything else dosent work. Sometimes I hear a quiet rumble or a hissing noise, but no air comeing through out of any of the vents. The times I noticed it actualy working is durning the day time, but in the morning or at night it dosent work it all. How can this be fixed?

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1 Answer

Tiny

merlin2021

October, 20, 2010 AT 11:59 PM

The rumble could be the blower motor bearings, and you should check the motor. Most easily done by carfully using a fused jumper wire from the battery terminals to the blower motor. Unplug the motor from thew connector and apply + wire to the blower Orange wire. And the _ wire from the battery to the black wire, if the blower does not come on, replace it.

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