Question about 1992 Cadillac DeVille

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Dead Battery After 2 days

I put a new battery & alternator on it. I have unplugged the leveling system & heat A/C blower motors also that has not helped.

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Check things like glove box ,boot or centre console lights. Also while recharging battery with engine cold feel alternator for any heat. Does alternator charge?

Posted on Jun 16, 2008

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Posted on Jan 02, 2017

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Why does motor shut off when I turn on the heat and air?


Electrical issue. The heat or air draws more current and the electrical system probably drops voltage below the threshold the electronic control module can handle. First check that the Alternator is charging correctly. When running the system should have 13 to14.7 volts measured at the battery. If you turn on the heat/AC and it drops significantly you have a current draw issue (most likely bad fan motor, or short) If the voltage is below 13 volts when the car is running your alternator is likely bad.

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So you have no blower at all?

None of the blower speeds work?

Not important whether you have heat or a/c,
you need the blower working,correct?

Need a diagram of where the blower motor resistor is
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Unplug the blower & eliminate that, by putting battery
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If the question is about no air conditioning,then you know
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I have a new alternator and starter and battery but when i have headlights on and heater my light s go dim and battery strength goes to 11.8. then goes back up when i turn off heater


Your blower motor is starting to fail. Over time electrical motors will wear and wea a little at a time. As they wear, they require more and more voltage to operate. Your blower motor now is almost at its limit, requiring twice as much power to operate than normal. Replace the blower motor. Also you could have a loose or weak alternator, which on the flipside isn't putting out enough power to run all your accessories. Here is your fix: make sure your alternator belt is tight, and check voltage and amp output of the alternator, if it all is ok, then your blower motor definatly needs to be replaced.

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1 Answer

My battery is every morning empty. Changed the dynamo, battery, steering contact. After removing the fuse of the radio / amplifier, battery keeps on level. Unplugging amplifier with fuse in results in low...


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My heater is not putting out any heat.


If the blower motor is running, then this is likely a cooling system issue. If the blower is not running, then likely blower motor resistors.
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No air movement in heating system


It can be a little bit of a pain, but fairly simple. The blower motor is usually located on the passenger side, under the dash, and with a few pieces of interior parts taken out from underneath, you should be able to access the blower motor. They have three to four bolts holding them up. Of course you have to unplug the electrical, be sure not to rip them out. Suggestion on fixing it, go the the salvage yard and get one. You can cut the wires off the one at the salvage and put them on your battery terminals, being very careful, to see if it works. Then you can just unplug those wires and put your on back home. I do suggest that you clean the new one out, it should be really simple to do. Hope it helps.

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