Question about 1976 Cadillac Deville

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1976 cadillac deville ac/heating problem

On my cadillac the highspeed fan doesnt work and i get heat all the time . i checked all wires ok . vacum hoses ok no breaks ,the dampers dont seem to operate right .ps if i hotwire the fan to the battery it works .ac is charged and pumping.fan operates at low speed thanks dave

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  • easydave Jul 02, 2008

    i have a wire diagram which i got off of the auto zone site but the colors dont seem to match the components . on the blower motor it self the tan wire plugs into a black wire from there it goes through something like a condenser or cap then from there the wire goes to a rubber mounted spade connection on the fan mount its self then from there a wire goes to another what looks like an other grounding point. on the fire wall. but

  • easydave Jul 02, 2008

    i have a wire diagram which i got off of the auto zone site but the colors dont seem to match the components . on the blower motor it self the tan wire plugs into a black wire from there it goes through something like a condenser or cap then from there the wire goes to a rubber mounted spade connection on the fan mount its self then from there a wire goes to another what looks like an other grounding point. on the fire wall. but no

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Check the resistor block; this resistor block controls the ground side of the fan motor, some caddys used a digtal display and on those the power relay also control power if was normaly found under the hood next to the wiper module some were under the dash.

Posted on Jun 30, 2008

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I have a 93 Cadillac Deville when I turn on the heat it blows a 10 amp fuse and the transmission stops changing gears. What is wrong?


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Jan 10, 2016 | 1993 Cadillac DeVille

1 Answer

After changing alternator in 95 cadillac deville the heat doesnt blow at all


The alternator does not have anything to do with the blower fan for heat. You may have unhooked a wire by mistake, or you have a blown fuse. God-Bless!

Feb 21, 2015 | 1995 Cadillac DeVille

1 Answer

I HAVE A 96 DEVILLE. MY PROBLEM IS THAT MY FAN WILL ONLY TURN ON IF MY AC IS ON..WHEN NOT ON, MY CAR OVER HEATS...ALSO,THE AC ONLY COMES ON WHEN MY CAR IS TURNED ON AND IDDLING...


Temperature sendin unit needs replaced it sends a signal to the dash for temp and also to the fan switch. The ac is turning on the fan because, when ac is on the car would run warmer, so the ac switch is also connected to the fan. Are you saying that the ac kicks on when iddling or that's the only time you can turn it on

Jun 19, 2012 | 1996 Cadillac DeVille

1 Answer

Cadillac deville 4.6,1997-ac/heating fan not blowing-any ideas?


Look undr the hood at the connectors that go to the fan motor and the ristiors check for bad connectors by starting the vehicle and turning the fan motor on .Then start moveing the connectors and wires around and see if the fan comes on . If so then its a bad connection and it needs to be cleaned or fixed .If not then you need to check switches to see if they are supplyed with power and the fan motor it self for voltage . But a lot of the time its just a bad connection and just needs some cleaning

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'94 Cadillac DeVille Concourse. My winsdhield


Follow the wires from the blower motor back to the blower motor resistor, normally only a few inches away and held in by a 7 mm screw. Replace it

May 13, 2010 | 1998 Cadillac DeVille

1 Answer

AC and blower sometimes does not come on immediately, Info center reads check coolant but coolant level is fine. Any relationship between the 2 issues??? 2001 cadillac deville


No coolant has to do with heat. freon has to do with ac. Now when you said your ac AND blower doesnt come on right away are you saying it does this ONLY when its on ac or when its on heat too. I would first change out your coolant level sensor or add coolant (which you said was fine) and see what happens. but im sure they are not in relation as the blower motor is on its own circuit

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1997 Cadillac deville overheats when airconditioner runs.Thermostat changed. Only does it when air is ran


are both fans running/working u have a fan for the vehicle it self and for ac/heat check to make sure ur fans r both working

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1 Answer

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If it's a nice car, get a new compressor installed. If it's borderline- get rid of the car.

I paid 2200 to Cadillac to fix the A/C and climate control only to have the transmission fail in my '93.

I dumped the car soon thereafter....

May 27, 2009 | 1996 Cadillac DeVille

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