Question about 1989 Cadillac Sedan DeVille

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Error code c or d 89 cadillac deville a/c or heat can not turn off gas gauge does not work

When car start the a/c and heater starts can not turn off. The gas gauge does not display, temp does not display. a code c or d shows

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: 1999 cadillac deville air wont work

There's a blower motor (fan) under the hood and up against the firewall near the center of the car that takes some work to remove. It has gone out in the last 2 of my 4 Cadillacs. Turns out if you're not real careful with the positioning of the spark plug wires they will brush up against it, and if one of them gets cracked or brittle it will "arc" and short out the blower motor. The a/c compressor should still come on (you'll hear a click when it engages) but you won't get any air blowing into the cabin, hot or cold.

The part was like $200 stock (year 2000 prices) and it took about an hour to remove it. My Caddy at that time had this damn strut bar going across the engine bay which we eventually removed to get to the blower motor.

Posted on Apr 09, 2009

defadad
  • 351 Answers

SOURCE: 92 cadillac deville 4.9L starting problems

There should be a wire that runs from the ignition to the solenoid, check that the wire has power when you turn the ignition key, if it has power the solenoid may need replacing.
Check to see if you have power getting to the distributor and the spark plugs, if you have spark it is possibly in the fuel system

Posted on May 19, 2009

  • 12 Answers

SOURCE: digital heater countrol and fuel gauge not working

i had the same problem in my 91 deville but the fuel gauge was intermittent at first, working most of the time then eventually it quit working all together, i also replaced my ignition switch thinking that was the issue but what actually happened is the fuel gauge shorted out the 16 volt supply from the bcm (body control module) which also feeds the ac and in my case the digital speedometer. your speedo probably isnt digital, but if you unplug the fuel gauge from the harness your ac gauge should come back on or vise versus unplug your ac and the fuel gauge should come back on right now im trying to locate fuel gauge. i hope this info is helpful to you, all you need to remove the gauge is 1/4 inch drive rachet and 7mm socket and a phillips screwdriver (#1) for the trim

Posted on Aug 04, 2009

  • 2 Answers

SOURCE: 1999 cadillac deville a/c off low refrig error

I had the same problem. The mechanic could not get the compressor to take in new freon. It has to do with the car's memory. You have to reset it by disconnecting the hot wire from the battery which for thirty seconds. This resets the cars internal memory, so it won't remember that it's out of freon. Reconnect it turn on the car and turn on the air the compressor will start.

Posted on Jun 28, 2010

  • 14036 Answers

SOURCE: 1991 cadillac sedan deville has excess pressure in

SOUND LIKE FUEL PUMP GOING BAD.BUT CHECK THE EVAP CHARCOAL CANISTER FILTER IF GAS SOAKED REPLACE IT REPLACE GAS CAP MAKE SURE GAS CAP IS THE PRESSURE VACUUM TYPE.ALSO CHECK VACUUM PURGE VALVE VACUUM HOSE TO CARBURETOR AND CHECK VACUUM HOSE TO CHARCOAL CANISTER FOR BLOCKAGE RESTRICTION OR BROKEN AND MISSING.

Posted on Oct 31, 2010

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These codes have nothing to do with instrument cluster !
DTC P0420: Catalyst System Low Efficiency Bank 1 , Catalytic coverter is bad ,
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Evap emissions purge solenoid is bad more then likely . Your best bet , take it back to where you got it .

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Temperature gauge not accurate


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http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
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http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

---------------------------
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Instrument panel.


There is a bad connection at the cluster,remove the cluster,and check the plug in to the cluster,it is a bad connection.Also check the alternator to make sure there is enough volts present,with everything on,lights,ac/heater,on high,it should read at the battery,while engine running,13.65 volts,to 14.25 volts,if it is any lower,replace the alternator.

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Might be speed sensor or fuse. very strange problem, but it is probably diagnostic hint that engineered to let you know there is a particular trbl in electrical sys,.. check a manual or dealer.

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