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I need a 2003 heater/ac wiring diagram. Position 2 and 3 on the fan switch gives same speed.

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  • Cars & Trucks Master
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Year make and model ?

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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SOURCE: A/C and Heater Only works on the highest speed

The blower motor resister is bad...It is very common in chevy trucks. The resister is located behind the glove box and is held in place by two screws, it will also have a wire harness attached to it. If you want to see a picture of it go to www.partsamerica.com and search for the blower motor resister.

Posted on Dec 15, 2008

  • 11 Answers

SOURCE: Heater/ac switch speeds 1 and 2 don not work in 99 Silverado

you need a resister found under your air duct by the passenger floor under dash board auto zone sells these for about 25.00 you may as well buy cabin air filters while your at it . 1 of the screws will be a pain to install back into the duct work I left mine out didn,t make a difference . you might have to order it as they are a comman item oh you will need a vacuum to clean up mess from cabin air filters .this is not a hard job .

Posted on Feb 28, 2009

  • 221 Answers

SOURCE: 2004 Ford F150 - AC/Heater blower speed 1 & 2 not working.

You might have a bad speed selector switch, or your blower motor resistor is faulty.

Posted on Mar 17, 2009

moparownr
  • 667 Answers

SOURCE: heater fan only works on fastest speed

Your blower motor resistor has gone bad, it should be located next to your blower motor in the car, held in place with a couple of screws, remove it and replace it. The resistor is responsible for making the blower motor run at slower speeds than high or (4). Let me know if this helps.

Posted on Jun 16, 2009

  • 1 Answer

SOURCE: 04 Wrangler AC fan only works on high speed (position4).

Its the switch behind the fan nob thats not making contact, you have to pop the cover off the dash where the radio fan and other gizmos are. Then remove the fan nobs by pulling them straight off after that unscrew the housing unit inside is the switch. You must carefully pry this open so as not to break the plastic clips holding it together the switch thats fryed should just pop out easy replacement fan switch! If my mind serves me right it costs 40$ to replace if you order from chrysler.

Posted on Aug 28, 2009

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Where located fuel sensor Suzuki Ario 2003


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  • clsk2003aeri011.gifInstrument Panel Harness Diagram for 2003 Suzuki Aerio SX 2.0 L4 GAS
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    1 Answer

    2003 chev malibu blower fan not working in position #1,#2 ,#3.Works fine on #4,#5 Help please


    its the heater fan resistor thats causing it. it has coils for different fan speeds, if a coil burns out or breaks. then you will loose that fan speed. to replace resistor, remove glove box to give ya more room so you dont have to stand on your head!! remove insulating panel under glove box. loosen and slide ecm to the side. now you can see heater blower fan, resistor is beside it, just remove wires , take out the hold down screws. and thats it!

    Jul 26, 2010 | 2002 Ford Taurus

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    I have a 1995 jeep cherokee sport 4wd 4.0L with air ps/pb/cc/abs. I recently (2 weeks ago) lost all ac/heater blower speeds except high and now 2 of the wires to the ignition switch get so hot with the...


    Never just replace any item because someone suggested it may have failed. Before replacing anything, you need to check each item for any signs it's bad. In addition to what I mentioned, the blower motor itself can also cause a problem if it is worn out and is drawing too much amperage to operate. If the blower makes any noise or the wiring becomes warmer than it should be after replacing any damaged parts, look at the motor. Bad motor ground can cause problems as well so check that too.

    May 18, 2010 | 1995 Jeep Cherokee

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    Heat/ac fan only blows on high


    Check the heater control switch,,,,,and the number of wires at the heater motor....Some motors have more than one winding...in which case there will be three or more wires going into motor..there can be burnout in those windings and will require a new motor....check the plug which attaches to the motor....can be bad connection...or at the switch.....but if there is only two wires....then the heater switch uses resistors to slow down the different speeds...and direct connection for high speed....and the problem is definitely the switch...

    Apr 27, 2010 | 1996 Lincoln Town Car

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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

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    1994 buick regal cooling fan's not working


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    Heater/AC fan only works on position 3 & 4.


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    Heater/AC fan does not blow on two lowest speeds.


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    Oct 25, 2008 | 2003 Buick Century

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