Question about 1997 Buick Riviera

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Heater the heater on my 97 buick riviera isn't working. where would the heater fan or motor blower be located at? We checked all the fuses. They were fine. How hard is it to fix the problem?

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  • bbrauch Dec 17, 2008

    If I drive above 40 mph I get some warn air, but city driving I freeze to death.

  • Anonymous Jan 03, 2009

    I had the same problem.. blower motor is located under passenger side dash. I took mine down (20 min) and cleaned it. Put it back and it has been working fine since.

  • natasha_e May 11, 2010

    does it not work at all or does it blow and just not get warm?

  • yadayada
    yadayada May 11, 2010

    Is he blower motor the problem? or is the control relay or blower speed control resistor the problem? these items must be checked first before the motor is replaced, the motor is $125.00 part so guessing is not really a good idea.

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The blower motor took mabe 30 min to replace it should be on the passanger side under the dash it has 3 screws to hold it in or it on the fire wall pass side

Posted on Feb 09, 2010

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1 Answer

I Have a 1998 Buick Rivera Blower does not blow i have power to the relay under the rear seat i have pulled the blower motor. by passed and motor fine no power to fuse left side of dash is there a rel


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The most likely problem is the blower motor resistor, aka blower motor module, blower motor speed control. It is typically located near the blower motor. The red wire is power from the battery and should be there all the time. Black is ground. Purple is power to the blower. Grey/black is the speed input from the HVAC module.

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Your Buick Riviera's heater fan is powered by a blower motor, which in turn is powered by a blower motor resistor. The resistor is a small electrical component that also regulates the fan speeds of the blower motor. Like any part, the blower burns out from time to time and has to be replaced. Replacement blower motor resistors cost about $50. It will take you about 30 minutes to install a new one in your Buick Riviera.

Things You'll Need

  • Socket set
  • Screwdriver
    • 1

      Open the hood and disengage the negative battery cable on your Buick Riviera using your socket set. You will need a 10mm socket to loosen the battery cable bolt.

    • 2

      Remove the plastic trim panel under the glove compartment on the passenger side of your Riviera.

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      Loosen and remove the mounting screws that hold the blower resistor in place on your Riviera.

    • 4

      Unplug the wiring harness from the old blower resistor and then remove the resistor completely.

    • 5

      Plug the wiring harness into your Buick's new resistor. Also tighten the screws to hold the resistor in place.

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      Reattach the negative battery cable on your Riviera and tighten it with your socket set.

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it will be hard to diagnose with out having my hands on it but try this.

this vehicle is known for blower motor resistor failure.

under the dash on the passenger side next to the blower motor there is a resistor attatched to the blower motor case it will have a single plug with 5 or 6 wires in it, they are normally within a couple of inches of the blower motor, remove this resistor and look at closely for any signs of burning this is a common problem, you can buy one at any parts house, do not operate the motor with the resistor removed from its mounting hole or you will damage it.

if the resistor looks good than purchase you a test light and drop me a line and i will explain how to test the entire system its not hard to do.

wesleyschacht@hotmail.com

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2 Answers

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