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Blower motor relay location 1998 buick century

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

AutoDoc
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SOURCE: horn relay 95 Buick century

It is located in the convenience center to the left of the steering column.

Posted on Aug 31, 2008

ZJLimited
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SOURCE: I need a diagram for

The blower motor is a variable speed motor. The higher the voltage applied to the motor, the faster the speed. Depending on the HVAC (Heater Ventilation Air Conditioning) option installed in the vehicle, blower speed control could be through a set of resistors or through a solid-state blower motor control module.Battery voltage to the blower motor is supplied by the heater & A/C control by way of the blower resistor (or blower motor control module). At low and medium speeds, the voltage is stepped down by the blower motor resistors. At high speed, the blower motor relay is energized, removing the blower motor resistors from the circuit. Battery voltage is then applied directly to the blower motor through the relay. The motor will then run at maximum speed.

Several types of HVAC systems were available on these vehicles, from manual to fully automatic electronic control. The blower motor speed can be adjusted manually by pushing the fan switch up or down or automatically by placing the heater & A/C control in the AUTO mode.

In general, this system is reliable. Because so many of the control operations are electronic, special diagnostic equipment really should be used for system diagnostics and check-out. An authorized technician using a scan tool can most quickly locate HVAC problems.

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Fig. Typical behind-the-instrument panel view of HVAC related components. Depending on the HVAC option, not all components are used on all vehicles

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Fig. Typical HVAC operation schematic
An inoperative blower motor could be caused by the following:

Blown fuse(s). The fuse should be replaced. There may be both a LOW BLOWER and HIGH BLOWER fuse. Some models may also call it the HVAC fuse. Even the RADIO fuse is used in some applications. Check them all. If a fuse is blown there may be a short to ground in one of the power supply circuits. Open Circuit. Check the circuit between the ignition switch and the blower motor, and the blower motor ground circuit. Repair as necessary. Faulty blower switch. A faulty blower switch should be replaced. Most heater blower circuits also include a blower motor relay (look in the underdash convenience center), as well as a blow motor resistor. These items should be checked especially if the blower runs in one or two speeds, but not all speeds selected.

The blower motor resistor is located on the back of the blower motor housing under the dash on the passenger side. It can be difficult to get at, but it is doable. Be ready with the ibuprofen the next day for your sore back.
Remove the cover panel from beneath the dash on the passenger side.
Unplug the power 'ribbon' wires leading to the resitor.
Unplug the wires that lead from the resitor to the blower motor housing. There are usually two, one black and one purple that share the same plug.
Remove the short hose that leads from the blower motor housing to the ventilation system ducts.
Remove the blower motor by removing the three hex screws that hold it in place.
Remove the resistor by removing the three hex screws that hold it in place. The resistor is right against the firewall so two of the screws are very difficult to reach. A slender flexible socket extension will make the job easier.
Attach the new resistor in place using the same hex screws. Only 1 or 2 of the original three are needed (the part is very light) if you do not feel like fighting with the ones next to the firewall.
Reatach the blower motor and reconnect the hose.
Plug the power cable wires back into the resitor and the wire from the resistor back into the blower motor.

Instead of hex screws mine were held in with 7/32 bolts. It was difficult, but easier than I had anticipated. I replaced two of the three bolts holding the resistor. The blower motor came with instructions saying that the plugs may have to be cut off of the resistor and the blower motor, then spliced together... I had to do this on mine.
I got everything back together and now the fan works on four of the five levels. It does not work on high.

I found on another site that said "high" uses a different circuit, with a separate fuse. I found the fuse panel on the passenger side of the dash when the door is open. The cover for the panel has all of the fuses mapped out, so it was easy to spot the 25 amp "Blower High Speed" fuse. I was very impressed to find the panel contained a fuse puller and replacement fuses. Mine was blown, I replaced it, and all is good with the world.

Hope helps.

Posted on Sep 08, 2010

  • 1509 Answers

SOURCE: 2001 buick century custom, where

bottom of the dash passenger side above the kick panel, the ballast resister that also fales is right next to it, going in from the bottom after the cover is off.

Posted on Oct 29, 2010

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SOURCE: I need the locations of

This diagram shows both.

1.image

Posted on Jun 11, 2011

  • 79 Answers

SOURCE: 1998 buick century my heater and ac fan only work on high i'm told it's the blower relays where are they located

they are not relays its a blower motor resistor a one piece unit usually held in by two bolts and an electrical connector either under the passenger side dash or behind glove box

Posted on Aug 03, 2012

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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


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

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1998 buick century when air or heat is on I hear a squilling noise , what is it?


Replace the heater blower motor or the caged fan attached to the blower motor, or both.

Oct 28, 2013 | 1998 Buick Century

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1998 Buick Century w/ manual control, smelled burning odor and blower motor quit working. Control Module?


blower resistor is common to burn causeing smell. check with dealer, there may be a campain on this problem. if not. replace resistor and harness (pig tail) and blower motor..

Jan 21, 2013 | 1998 Buick Century

1 Answer

1998 buick century my heater and ac fan only work on high i'm told it's the blower relays where are they located


they are not relays its a blower motor resistor a one piece unit usually held in by two bolts and an electrical connector either under the passenger side dash or behind glove box

Aug 03, 2012 | 1990 Buick Century

2 Answers

98 century heater blower motor resistor location


look under the passenger side of the dash. There will be a plastic trim panel that will need to be removed. Once its out of the way you will see the blower motor. The resistor will be just to the drivers side of the blower motor.

Nov 15, 2011 | 1998 Buick Century

1 Answer

Blower on 98 buick century location


The blower motor is located on the passenger side below the glovebox under the dash.

Jan 16, 2011 | 1998 Buick Century

1 Answer

My heater stop working suddenly on my car. It just stop working completely and all together ... Air condition and everything.... How can I troubleshoot the problem? It was working fine one minute and then...


I assume you mean that the blower motor quit running. Did you try it to see if it will run on any speed? If it won't run on high, but runs on the lower speeds, it is most likely a bad blower motor high relay. If it will not blow on any speed, it could be the blower motor fuse (In which case, you must find out why it blew or it will only happen again.) or the blower motor itself. Buick Century is known to burn the connector at the blower motor. There is a replacement connector available in the aftermarket to repair this. I personally recommend replacing the blower motor also if it is a burned connector because the blower motor is usually partially shorted internally, which is what causes the connector to get hot and burn.

Dec 18, 2010 | 1998 Buick Century

1 Answer

The blower motor stopped working. I would like to know where it is located, and how to change it. Thanks


Right hand side under the dash, remove:

  1. Battery ground negative cable.
  2. Right side instrument panel insulator.
  3. Blower motor cooling hose.
  4. Blower motor electrical connectors.
  5. Blower motor mounting screws.
  6. Blower motor.

May 07, 2009 | 1998 Buick Century

1 Answer

Heater/AC Fan does not work in our 1998 Buick Century


Fan will be under dash on passengers side , Removing glove box might be needed, Gm also uses a blower resister ro control fan speeds. First check your fuse and then check and make sure your getting 12 volts to the terminal at the blower, You could have a blown fuse, a bad switch, or a bad resister , if your getting voltage to blower motor then most likely it will be the motor. These are not to difficult to change. I hope this helps, please be aware I can only guess at what the problem is from my past experience.

Dec 18, 2008 | 1998 Buick Century

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