1977 Cadillac Brougham automatic climate control problem

1977 CADILLAC FLEETWOOD BROUGHAM
133,000 MILES • V8 • 2WD • AUTOMATIC
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VEGA88
  • MEMBER
  • 1 POST
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?
Oct 20, 2010 at 4:09 PM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
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.
Oct 20, 2010 at 4:59 PM
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