How to Replace a Blower Motor in Cars

by Contributing Writer

The blower motor in a car is a small electrical motor located inside the vehicle’s heating and air conditioning duct. The blower motor works in conjunction with the heater core by drawing air from outside the vehicle and blowing it across the core. This heated air is then used to warm the passenger cabin. The blower motor on your car may fail with little or no warning, but if you notice your heater is underperforming or you hear a grinding or scraping noise coming from the firewall on the passenger side of the vehicle, it could be a sign that the blower motor will soon need to be replaced.

Under The Hood:

 How to Change a Blower Motor on a 1994 Dodge Dakota

Remove the lower steering column cover, using a 7 mm socket. Remove the windshield wiper control and the module-to-dash bolt on the passenger side of the steering column, using the same socket. Remove the courtesy light.

Open the glove box and remove all the screws along the top edge, using a Phillips screwdriver. Remove the screw next to the ash tray. Move the module out and down enough to disconnect the electrical connectors and vacuum hoses. Remove the glove box light wire.

Remove the blower motor housing from the module by removing the screws at the top and the five screws around the housing, using a Phillips screwdriver. Remove the blower motor housing from the module. Remove the three screws securing the blower motor to the housing and remove the blower motor from the vehicle.

Remove the blower motor fan by removing the clip on the end of the shaft. Install the fan and motor followed by the rest of the parts removed in reverse order of removal.

Items you will need

  • Set of 1/4-inch drive sockets

  • 1/4-inch drive socket driver

  • Phillips screwdriver

 How to Replace the Blower Motor on a Chrysler Minivan

Remove the glove box by removing the screws on the bottom that secure the lid and the top line of screws--including the striker latch--using a socket. The blower motor is located behind the glove box. With a socket, remove the screws in the flat plastic plate covering the blower motor.

Disconnect the electrical plug from the blower motor. Pull the grommet with the electrical wire out of the blower motor case. Feed the wire through to the motor. You can see where the wire from the motor passes through the case with a grommet sealing the hole.

Remove the three screws securing the blower motor to the case, then take out the motor. Remove the nut securing the fan to the motor shaft using a socket. Lift the fan off the shaft. Place the fan on the new motor. Install the nut and tighten.

Install the new motor in its pocket in the case. Install the three screws and tighten. Pass the electrical harness wire with the grommet through the case and push the grommet in place.

Connect the electrical harness plug. Install the cover plate and screws and tighten. Install the glove box and screws and tighten.

Items you will need

  • Ratchet

  • Set of sockets

 How to Change a Blower Motor on a Sunfire

Open the driver's side door on the Sunfire and pull the hood release lever. Raise the hood and locate the engine’s battery.

Identify the negative battery post by looking for a small minus (-) symbol on top of the battery’s case.

Loosen and remove the cable connected to the negative post on the battery with a socket wrench.

Hold the negative battery cable in one hand and use a roll of electrical tape to wrap the metal connecting terminal on the end of the cable. Once wrapped with the tape, position the cable away from the battery as well as any other engine components.

Open the front passenger side door and pull the seat release lever while pushing the entire seat back as far as it will go. This will give you more available working area in an already cramped space.

Kneel down and position yourself so you can see under the dashboard just below the glove box. There should be a 2-1/2 foot piece of black trim panel mounted horizontally beneath the dashboard.

Remove the three bolts from the trim panel with the socket wrench then pull the trim down from its mounting position. Set the trim panel and the three bolts on the driver’s side floor area out of your way.

Locate the blower motor under the dashboard. With the trim removed, the blower motor will be in direct sight. It looks like a small top hat turned upside down with wires connected to it.

Disconnect the wiring harness plug from the rear of the blower motor. Tuck the wire out of the way temporarily, under the floor’s carpet for now. If the harness plug seems hard to disconnect by hand, use a flat head screwdriver to pry the harness plug off of the blower motor.

Remove the three bolts holding the blower motor in place one at a time. Before you remove the last bolt, support the blower motor to prevent it from dropping. Supporting the blower motor also prevents you from stripping its bolt due to the uneven weight on it. Once you remove the final bolt, lower the blower motor down and out of your Sunfire.

Install your Sunfire’s new blower motor by reversing the removal process.

Start the engine when you’re finished and test the new blower motor on all of its settings.

Items you will need

  • Socket wrench set

  • Electrical tape

  • Flat head screwdriver

 How to Change the Blower Motor in a 1992 Jeep

Raise the hood on your Jeep and remove the negative cable from the battery with a socket wrench.

Wrap the metal terminal on the end of the cable with black electrical tape. It may take multiple layers to cover the terminal completely, but no metal should be showing at all when you’re finished.

Push the cable to the side of the battery, away from its post entirely. Also, make sure that the cable isn’t resting on any other metal or touching the engine itself.

Locate the blower motor at the back of the engine compartment on the firewall. It will be recessed into the firewall, so you will only see the top of the motor. The top of the blower motor looks like a tin can, kind of like a tuna fish can, but all black.

Unplug the wiring harness from the blower motor. Grasp the harness by its plug; don’t try to pull the connection apart by the wires. The harness plug has a safety clip on it that you have to depress while unplugging the harness. Sometimes safety clips are hard to press down by hand. Use a flat-head screwdriver to assist you if needed.

Remove the three bolts holding the blower motor into its housing on the firewall with a socket wrench. Place the bolts in your pocket because you still need them. The new blower motor does not come with new bolts.

Pull the blower motor away from its housing toward you. Before you remove it from the engine compartment, make sure there aren’t any wires caught-up or crossing it. Then remove the blower motor and set it to the side of your work area.

Install the new blower motor by reversing the removal steps.

Items you will need

  • Socket wrench set

  • Black electrical tape

  • Flat-head screwdriver

 How to Replace the Blower Motor on a '93 Chevy Truck

Use a socket wrench to remove the lower attaching bolts for the glove box and a screwdriver to remove the glove compartment insert where it attaches to the dash frame. Once loose, set the assembly aside. Reach through the opening and unplug the main computer. Use the socket wrench and remove the computer mounting bolts, then pull it out of the way and set it aside. Use the screwdriver to remove the retaining screw that holds the kick panel in place and pull the panel out of the way.

Loosen the lower bolt that attaches the dashboard to the A-pillar with a socket wrench. Use a socket to remove the small screws that hold the blower motor in place and unplug the two wires that connect from the dash wiring harness to the blower motor connector. Pull the blower motor back, then have an assistant lift up on the right side of the dash or use a pry bar and lever the dash upward to allow enough clearance to remove the blower. Maneuver the motor downward and remove it from under the dash.

Install the new blower motor by reversing the steps for removal. Lift up on the dash to install the motor into its opening. Tilt the motor back to start the lower cage into the duct opening, then fit it into place. Install the mounting screws and and tighten them with the socket wrench, then plug in the wiring connector. Reattach the main computer and plug it in as well.

Reinstall the kick panel and tighten the mounting screw with a screwdriver. Reinstall the glove compartment and secure the bolts and screws accordingly. Start the truck and test the blower for proper operation.

Items you will need

  • 3/8-inch socket set

  • Screwdriver set

  • Pry bar

 How to Replace a Blower Motor in a Suburban

Raise the hood and use a socket wrench to remove the negative cable from its post on the battery. Once removed, wrap the entire metal terminal at the end of the cable with electrical tape and then position the cable away from the battery. The negative cable on the battery should be all black and right on top of the battery next to it you should see a small minus symbol.

Open the front passenger’s door and position yourself so that you can see under the dashboard. Locate the blower motor. It looks like a metal can protruding out of the firewall behind the glove box.

Reach up under the dashboard and unplug the wiring harness connected to the blower motor. Tuck the harness to the side. Pinch the rubber cooling tube right where it enters the blower motor and pop it out of position from the motor.

Remove all of the bolts from around the base of the blower motor with a socket wrench. Do not lose the bolts; place them in the cup holder for safekeeping.

Pull the blower motor outward from its housing and lower it down from beneath the dashboard. Set the old blower motor to the side of your work area. Raise the new blower motor up into position and insert it back in the housing.

Return all of the bolts around the base of the blower motor by hand. Tighten all of the bolts until snug with your socket wrench and then tighten each of them an extra quarter turn.

Plug the blower motor’s wiring harness back up to it and reinstall the cooling tube back into its original position. The cooling tube simply pops back into place, just as you removed it.

Unwrap the tape on the negative battery cable’s terminal and discard it. Connect the cable back to its post on the battery and tighten its securing bolt by hand. Set your 3/8-inch drive torque wrench to 12 foot-lbs. and secure the cable into position. Shut the hood and start your Suburban’s engine. Check the functionality of the new blower motor to make sure it works on all settings.

Items you will need

  • Socket wrench set

  • Electrical tape

  • 3/8-inch drive torque wrench

 How to Replace the Blower Motor on a 2005 Chevy Impala

Remove the lower right dash insulator panel. Pull the retainers out with your fingers, and lower the panel. Twist the courtesy lamp counterclockwise to remove it from the insulator panel.

Disconnect the electrical harness from the blower motor. Remove the three retaining screws from the blower assembly with a screwdriver. Pull the blower motor down to remove it from the housing.

Install the new blower motor by pushing it up into the housing. Attach the blower motor with the three screws, and tighten them securely with a screwdriver. Connect the electrical harness to the blower motor.

Attach the courtesy lamp to the dash lower insulator panel by twisting it clockwise. Install the insulator panel, and push in the retaining clips to secure the panel. Start the vehicle, and turn on the fan blower to ensure it works properly.

Items you will need

  • Screwdriver

 How to Replace the Blower Motor in a 1992 Honda Accord

Remove the negative battery cable from the battery with a 1/4-inch drive ratchet and socket.

Open the glove box and remove the four lid mounting screws with a Phillips head screwdriver. The lid mounting screws are located at the bottom of the glove box. Remove the glove box lid.

Remove the four mounting screws on the front corners of the glove box and the two mounting screws beneath the front lip of the glove box with the Phillips head screwdriver. Remove the glove box from the dashboard. The blower motor in the 1992 Accord is located behind the glove box inside the dashboard. Removing the glove box is the easiest way to access the blower motor.

Insert a flat head screwdriver between the blower motor and the small vent tube protruding from the motor. Push the screwdriver handle away from the blower motor to pry the tube off of the motor completely.

Remove the three blower motor mounting bolts with the 1/4-inch drive ratchet and socket. The 1/4-inch drive tools are small enough to give you room to maneuver inside the tight space in the dashboard. Remove the electrical connector from the blower motor by hand. Remove the blower motor from the dashboard.

Install the new blower motor. Install the small vent tube onto the new blower motor by hand. Tighten the three blower motor mounting bolts between 30 and 50 foot-pounds of torque with the 1/4-inch drive ratchet and socket.

Reattach the positive and negative wires onto their appropriate terminals on the blower. Reinstall the glove box and tighten all of the glove box bolts between 10 to 20 foot-pounds of torque with the 1/4-inch drive ratchet and socket.

Replace the glove box lid and tighten the bolts between 10 and 20 foot-pounds of torque with the Phillips head screwdriver.

Reinstall the negative battery cable onto the battery and tighten the cable between 20 and 40 foot-pounds of torque.

Items you will need

  • 1/4-inch drive ratchet and socket set

  • Flat head screwdriver

  • Phillips head screwdriver

 How to Replace a Blower Motor in a Car

Removing the Blower Motor

Disconnect the ground cable from the negative battery terminal. Loosen the retaining bolt using a wrench. Pull the clamp off the terminal.

Locate the blower motor. On most vehicles, it will be located inside the engine bay along the firewall on the passenger side of the vehicle. On some vehicles, it may be located inside the passenger compartment, below the dash on the passenger side of the vehicle.

Pull the wiring connector or connectors off the blower motor, using your hand. In most cases there will be one plastic connector. If there are more than one, use masking tape and a marker to label them for reassembly,

Using a socket, unscrew the screws that secure the blower motor to the heater case or firewall.

Pull the blower motor and fan blades from the vehicle as an assembly.

Unscrew the nut that secures the fan blades to the motor, using a socket.

Pull the fan blades away from the motor.

Installing the Blower Motor

Drop the fan blades into position on the new motor.

Screw on the nut that secures the fan blades to the motor.

Slide the motor/fan blade assembly into position in the heater case or firewall.

Screw in the screws that secure the blower motor to the heater case or firewall.

Press the plastic wiring connector onto the back of the blower motor.

Reconnect the ground cable to the negative battery terminal. Slide the clamp over the terminal and tighten the retaining bolt with a wrench.

Test for proper operation.

Items you will need

  • Wrench set

  • Masking tape

  • Marker

  • Socket set

 How do I Replace a Blower Motor on a 1999 Mazda Protege?

Open the front passenger’s side door on your Protege. Position yourself so that you can peer underneath the dashboard.

Locate your car’s blower motor. The top of the blower motor looks like an upside down metal canteen cup. On the left side of the motor, you should also see a cooling tube. It connects to the HVAC housing at one end and to the blower motor on the other.

Disconnect the cooling tube from the HVAC housing by pulling downward on the tube. Your new blower motor should come with a cooling tube already attached to it.

Unplug the blower motor’s wiring harness. If the space is too tight, lower the glove compartment door.

Remove the three bolts from around the blower motor’s base plate with your socket wrench. Carefully lower the blower motor from its position in the HVAC housing and discard it.

Raise your new blower motor up into position beneath the dashboard. Insert it into the HVAC housing in the same exact position and orientation as the old blower motor.

Support the blower motor with one hand. Use your free hand to thread all three of its mounting bolts. Tighten the bolts as tight as you can by hand. Secure the bolts in place with your socket wrench.

Plug in the blower motor's wiring harness. Shut the glove box if you opened it. Push the new cooling tube onto its connection on the HVAC housing. Start your Protege’s engine and check the functionality of the new blower motor.

Items you will need

  • Socket wrench set

 How to Replace a Blower Motor in My Envoy

Front Blower Motor

Remove the right instrument panel insulator and the glove box door using a trim tool to minimize scraping to the interior panels.

Disconnect the electrical connector from the blower motor. Remove the blower motor screws and cooling tube using a screwdriver.

Remove the blower motor and separate it from the cover. If you are replacing the blower motor with a new one, remove the fan from the blower motor. The fan is pressed onto the blower motor shaft and can be pried off with two screwdrivers.

Install the fan onto the new motor and install the blower motor into the heater housing. Tighten the blower motor screws and attach the cooling tube.

Reconnect the electrical connectors and reinstall the glove box door and instrument panel insulator.

Auxiliary Blower Motor

Have the air conditioning system discharged at a service shop or dealership to relieve the system's pressure. Do not loosen any hose fittings or remove any components until after the system has been discharged; it must be properly discarded in order to comply with EPA-approved procedures.

Drain the cooling system by placing a large container under the radiator and loosening the hose clamp on the lower radiator hose. Slide the hose back and allow the coolant to being draining and then remove the radiator cap. Replace the hose and tighten the clamp once drained.

Remove the HVAC module using a trim tool to minimize scraping. Disconnect the electrical connector from the HVAC auxiliary module.

Remove the air outlet duct. Remove the blower motor screws using a screwdriver, and remove the blower motor.

Reinstall the new blower motor into the housing. Tighten the blower motor screws and reattach the air outlet duct. Reconnect the electrical connector and replace the HVAC module. Recharge the air conditioning system and refill the radiator with coolant.

Items you will need

  • Trim tool

  • Screwdrivers

  • Blower motor

 How to Change a Blower Motor on a 1999 Oldsmobile Intrigue

Removal

Turn off all electrical devices and turn the ignition key to the "Off" position.

Remove the battery's negative cable bolt with a wrench. Pull the negative battery cable off of the battery.

Locate the passenger side instrument panel insulator panel located under the passenger side of the dash. Remove the two panel retainers from the panel with the retainer pin removal tool. Pull the panel off of the locating stud and away from the dash.

Disconnect the panel harness clip by hand and move the harness out of the way of the blower motor. Unplug the blower electrical connector by hand. Remove the cooling hose from the blower motor by hand.

Remove the blower motor retaining bolts with a wrench. Lower the blower motor and fan out of their housing.

Installation

Position the new fan and blower motor in the housing. Install and torque the blower retainer bolts to 14 foot-pounds with a 3/8-inch torque wrench and socket.

Install the blower motor cooling hose onto the motor. Snap the electrical connector into place on the motor by hand. Position the panel harness and snap the retaining clip into place by hand.

Position the panel insulator under the dash. Install the panel retainers through the panel and into the supports until the retainers snap into place. Push the panel upwards and toward the rear of the vehicle to fully engage the panel to the dash.

Install the battery's negative cable and bolt onto the battery. Torque the bolt to 11 foot-pounds with a 3/8-inch torque wrench.

Disable the radio Theft-lock feature with the Theft-lock code. Follow the instructions for your radio to input the Theft-lock code so the radio will function once the battery is reconnected.

Items you will need

  • Wrench set

  • Retainer pin removal tool (Oldsmobile special tool part number J38778)

  • New blower motor unit

  • 3/8-inch torque wrench

  • Socket set

  • Radio Theft-lock code

 How to Replace the Blower Motor in an Alero

Make sure you are parked in a well-lit area. The Alero's blower motor is located underneath the passenger side of the dash, so you may need to use a flashlight to locate it. Disconnect the negative battery cable before beginning the procedure.

Remove the glove box door by opening it and squeezing the side tabs to unhook it from the dash. Lower the closeout panel mounted between the glove box and the dash. Slide the panel to the right to remove it. The closeout panel blocks the glove box from the inside part of the dash; it must be removed to access the blower motor.

Disconnect the electrical connection from the BCM (Body Control Module). Remove the two screws mounting the module to its bracket, then slide the module from the bracket to access the blower motor.

Disconnect the blower motor electrical connection. Remove the blower motor retaining screws to unhook the blower motor, then slide the motor through the glove box opening.

Mount the new blower motor in the same location as the old one. Replace the mounting screws and attach the electrical connection. Replace the BCM, its connector and its mounting screws.

Slide the closeout panel back into its clips and close the panel. Reattach the glove box door and reconnect the negative battery cable.

Check the air-conditioning fan controls to make sure your new blower motor is operating correctly.

Items you will need

  • Pliers

  • Flashlight

  • Phillips screwdriver

  • Flathead screwdriver

  • Socket wrench

  • Replacement blower motor

 How to Change a Blower Motor in a 2002 Buick Lesabre

Shift the Buick's transmission into park and turn off the engine. Apply the parking brake and turn on the interior dome light.

Remove the plastic panel underneath the passenger side dashboard area. This panel contains built-in retaining clips and simply pops off by hand.

Remove the three 8 mm nuts holding the blower motor assembly into the dashboard HVAC unit, use a 1/4-inch ratchet and an 8 mm socket. Remove the blower motor's electrical connector and discard the old blower motor.

Install the new blower motor in the HVAC cavity and replace the 8 mm mounting nuts. Reconnect the blower motor's electrical connector and replace the plastic panel. Turn on the ignition and test the blower motor on all of the fan speed settings.

Items you will need

  • 1/4-inch ratchet

  • 8 mm socket

  • Replacement blower motor