Question about 1989 GMC Safari

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94 gms safari van heater blower not working

I tried everything from the fuse box to the wires and still nothing what is happening Hi we have a 89 gmc safari van and heater blower/fan just stopped. We bought a new hearer relay and nothing, we think that ya have to pull everything out in left corner and get to the fan/blower and change it. BIG JOB!

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  • christina trohan Jan 17, 2009

    we know its on the left side (passenger), but if the wire has a problem we are not sure. We do know one thing, that the week before the heater stopped, it smelled like it was burning/melting!

    If we knew exactley what and where to look, we could get closer to finding the resistor.

    to your question, we are not sure.

  • christina trohan Jan 19, 2009

    We found the blower/motor, we are pulling it out tomorrow and we are going to try jump starting it and see if its just the motor, if so then needs new motor!

    I think though I understand the the plug inside, it looks like the the relay we tried to replace yesterday.

    This plug u mention inside on passenger side is it a black little box? Is this the blower motor plug u are talking about?

  • christina trohan Jan 19, 2009

    if you can see the blower motor plug inside veicle passenger side unplug it and look at the color and shape of the wiring.

    What was this stated above on comment posted Jan 19th?

    We know the blower/motor is under hood on passenger side, no problems there.

    We will let you know if changing the motor fixes the problem.

    Thanks

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This van has a resistor under hood for the blower motor and is the blower motor getting power to it

Posted on Jan 17, 2009

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  • Ron szarafinski Jan 18, 2009

    the resister in right side engine bay under hood and will be 3-4 inches long and 1-2 inches wide ans have 2 screws holding it in place at each end. i think it has 3-4 wires pluged into it. but now it sounds like the blower motor has just internally shorted. if you can see the blower motor plug inside vehicle passenger side unplug it and look at the color and shape of the wiring. please let me know thanks

  • Ron szarafinski Jan 19, 2009

    the plug i am refering to is under hood passenger side

  • Ron szarafinski Jan 19, 2009

    Yes it will if the blower motor resister is good that is the plug i am asking you to look for not the blower motor plug keep me posted

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94 gms safari van heater blower not working


I had the same problem in my 1994 safari. I thought it mite have been the resistor form other peoples comments. I removed it and tested it. The resistor was fine. The heater fan relay was bad, but I was able to repair it myself. If you remove it and inspect it there should be two contacts that need to make a good connection in order for it to work properly. When the fan is on high there is a little electro magnet that pulls the contact up and engages the fan motor to full speed. When it is not on high the lower part of the contact rests on the lower half of the relay flap. if there is not a clean connection at this location you are not sending signal to the resistor which controls the other three fan speed settings. Inspect this connection and if possible clean the contacts with emery cloth and make sure that the contacts are making a good connection. This should do the trick to make the lower speeds work if the resistor is still good. If this is too much brain damage try replacing the relay first and see what happens, if you are still getting the same result then the resistor or the fan switch is bad.

Good Luck!

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