Question about 2004 GMC Envoy

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Ac and heater fan does not blow is there a place where i can read out the fan motor with a meter with out taking the dash apart

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You can get to the blower motor resistor pack and blower, they are located behind the glovebox. You need to remove the glovebox door and interior.

Posted on Sep 27, 2010

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1 Answer

I have a 2003 Saturn L200 2.2L Manual Drive and the heater or AC will not work no air blowing. It all happened one day when I had the AC on because it was hot out and then it just quit blowing and I


This could be the fuse check the fuse panel. This could be the resistor in the heater plenum behind the glovebox, it could also be the heater fan motor. The easiest thing to check is the fuse, then use a volt meter on the heater fan motor and if you have voltage there, it is the motor. If not it is most likely the resistor.

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How do I replace the blower switch in the dash without breaking up the dash


Are you sure that you need a blower switch? There are other items that are prone to going out before the switch like the resistor or the motor, but if it is the switch you first remove the large piece of trim that surrounds the radio, heater controls, and instrument cluster. This will reveal the screws that hold the heater control head into the dash.

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Does it have coolant in the radiator Check this first . Does the fan Work ???

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The fan motor probably shorted and blew the fuse. The other possibility is that the fan switch melted and the positive wire shorted to ground somewhere. I have seen the switches actually melt the dash where it is located on Ford vans. If you un-plug the fan motor and replace the fuse and try to use the switch and it does not blow the fuse, the motor is probably bad. If you have a volt meter you could check the motor to see if there is a dead short between the positive terminal on the motor and the motor case using the Ohms scale. Hope this helps you out!

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My 94 integra ls not blowing air. when i turn on the ac the compressor comes on but blower does not. i need a diagram of the ac/heater blower motor


Hello! Here is a test procedure to isolate the fault in the blower motor circuit. Make sure ignition key is off...Remove the glove box...
Located on top of the blower assembly box is a connector with the following wires; Blue, blue/white, blue/ yellow, and blue/black. The device that the plug was connected to is called the resistor pack. Two screws hold it in place. Remove the resistor pack and check it for open or burnt resistors. If it is defective purchase a new one. Average cost is $25. If the fan motor did not run in the high position then more testing is required. If the air conditioner dash light comes on when you select A/C that eliminates the A/C switch. Next set the fan speed to first position. Place your ohm meter on the X10 scale and measure between the blue wire to ground...set fan speed to next position; measure between blue/white to ground...set next position; measure between blue/yellow to ground. Set fan to high position; measure between blue/black to ground. All readings should be zero ohms (full meter deflection). If they are not then the fan speed selector switch needs to be replaced. If all readings are correct then replacing the resistor pack will solve your problem.


Guru...saailer

Dec 13, 2009 | Acura Integra Cars & Trucks

1 Answer

My AC/Heater fan isn't blowing but I can tell the heat and AC are working. How in depth is it to replace the fan/blower motor? Does it require taking half the dash apart like the heater core did? Or is it...


dear friend you are right you to remove basicly the complete dash to get to it,i think you must look at al the other things before attempting to remove the fan

Nov 09, 2009 | 1999 Jeep Grand Cherokee

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I have a 1995 Toyota Corolla the blower to the


pull dash apart and check your switchs they might be dirty

Jul 13, 2009 | 1989 Toyota Corolla 2 Door

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Heater fan blowing intermittently or not at all


unhook your battery unplug the harness that's touchy get a sharp object that you can pry the connectors together with you will see them wide open crimp then tight enough to get a good tight fit, the amperage draw from the motor has stretched them out and when it gets warn with current passing threw it opens up and loses contact. while it's apart take a emory board and clean the flat spades on the other side so you have a good connection.

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The heater


Chevy what? The air is coming in from driving, Is your blower motor working?

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1 Answer

Heater blows cold, and fan switch only works on 4 and 5


working on 4 and 5 speed that the resistor that broken cold air you got to move the selector to see the motor that move the trap hot and cold sometime when the motor was not move to the hot side for a long time its jam the motor on the passager side under dash put to hot and gently tap the motor tanks pierre

Oct 24, 2008 | 2002 Chevrolet Malibu

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