Question about 1989 Buick Riviera

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No blow hello i have a 89 riviera and cannot get the fan to blow at any speed bought new blower motor are there any fuses somewhere else other than by the seat what is a hvac programmer please help Hot Hot down here

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Most likely it is the Output Driver Module for the Fan. Your RIV has an extensive diagnostic available. Go to CLIMATE and press OFF and TEMP down arrow at the same time. Hold in and the car will go into the service mode. Read codes for the HVAC

Posted on Aug 16, 2008


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2 Answers

Why doesn't blower work?

The motor or the speed selector could be defective.

Feb 12, 2016 | 2008 Nissan X-Trail

1 Answer

Blower not working at all. Fuses & relays ok. Aircon cuts in when fan is turned on but no air from vents. Need to know what colour wire supplies power to the blower before I assume the motor is faulty

the blower is silent.????????? yes, sounds matter !
ON HIGH TOO? (fan speed max)????
or makes normal sounds, but does not blow.
1 or the other.?

the blower if dead silent can be hot wired (blows now?) (costs zero to do)
or using any voltmeter made. measure for 12vdc on the 2 pin
to motor, fan on high. (costs $10 for tool at walfart)
if 12vdc there, (across the 2 pins) then the fan is bad.
of 0v, the controls are dead.
the fan on most cars. on high, bypass the fan speed resistor block.
what you dont have is the schematic,
its at 2 places (usa ,min)
and suzukipitstoppus. (real fsm book)

2000 GV, data, below.... it takes all of 10sec to look.
all answers, USA cars, as this is a USA forum.
i click HVAC for you.
as you can see the switch is grounded at red circle.
and with fan on high ground (0v) is applied to the motor low pin
and if the relay is hot, (2 fuse good) the output of relay b/w wire
will be at 12vdc, if not the relay is bad.(fuses good)
cant be more simple. same from 89-2000 after that things get harder, (controls) your car has a motor driven mode damper
that is why i asked the sounds questions. as it too can block the air flow. (with a perfectly running fan)


May 03, 2015 | 2000 Suzuki Grand Vitara

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

Not sure hat rely you are checking but the blower motor does. To have a relay in the rear fuse block. The fuse you're checking protects the HVAC computer. The HVAC computer uses that circuit to monitor the voltage going to the blower motor.

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.

Sep 13, 2014 | 1998 Buick Riviera

2 Answers

Heater blower went out

Normally when the blower motor goes out it has trouble a few days before and cuts in and out so I would check fuses first but I may be wrong and if the fuses are fine the I would change the motor

Jan 22, 2013 | 2001 Honda Passport

1 Answer

How do I get to the blower motor on a 1984 oldsmobile toronado?

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.

    • 3

      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.

    • 6

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

Jan 11, 2012 | 1984 Oldsmobile Toronado

1 Answer

Why wont my a/c or heater fan come on?

When the blower works only on the high setting its usually a bad blower resistor which is right near the blower motor. now you say it would always blow high regardless of the fan speed setting that would indicate probably the climate control unit or a connector problem somewhere. finally it not working at all may be the climate control unit or connection went bad even further. it might have a blown fuse or a bad blower motor in addition to the climate control unit or connector problem .check for power and ground at the blower motor. the power is supplied from fuses and may have a relay also. the ground is supplied from the climate control unit and goes through the resistor to control the fan speed. good luck

Oct 30, 2011 | 1997 Lincoln Continental

1 Answer

The heater is working, if you touch the duct is hot. but no air is blowing out.

Try your blower on all speeds. Sometimes the high speed will work and that would mean you have a bad resistor for the fan motor.
If it doesn't work on any speed you could have;
1. A blown fuse.
2. A bad fan switch.
3. A bad connection/short somewhere between the switch and the fan motor.
4. A bad fan motor.

This is the order that I would troubleshoot from.

I hope this helps you.

Feb 03, 2011 | Chrysler Town and Country Cars & Trucks

3 Answers

The blowing of my 95 buick riveira quit

Check the heater blower fuses first. If you have an owner's manual, it will tell you where they are... Might be a bad switch. Try the easy stuff first before you ripp into the dash panel...Good Luck

Feb 14, 2010 | 1995 Buick Riviera

1 Answer

01 grand prix gt blower issues

WEll, the next step is to find where the short is. Disconnect the fan wiring, and replace the fuse again, if it blows, the fault is between the fuse and the fan, but I expect fuse will not blow.

Most likely a fan problem, if the above test does not blow fuse, apply auxillary power to the fan and see if it goes, I expect probably not, but will spark.... if this happens, you would be looking at blower motor replacement.

Sep 21, 2009 | Pontiac Grand Prix Cars & Trucks

3 Answers

A/c fans wont blow

If the fuse is blown for the blower then there is a short, that is not an answer, go to the blower and check to see that the blower motor connector has 12 volts to it when the blower is set to high speed on control, if it does then u need a new blower motor, if it doesn't then the control switch is defective or the blower motor speed control resistor is defective.

May 13, 2009 | 2000 Mercedes-Benz S-Class

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