Heater Blower not functioning

Automatic or manual climate control ?

• The blower motor does not operate correctly - manual climate control

• Circuitry short
• A/C blower motor resistor
• A/C blower motor switch
• Blower motor high speed relay

• Go To Pinpoint Test O .

• The blower motor does not operate correctly - EATC

• Circuitry short/open
• A/C blower motor speed control
• EATC module

• Go To Pinpoint Test Q .

Pinpoint Test Q: The Blower Motor Does Not Operate Correctly - EATC
Normal Operation Under normal operation, the blower motor control module receives a 1-2 volt signal from the EATC module through circuit CH218 (GN/VT) to determine the desired blower motor speed. The EATC module receives a feedback voltage from the blower motor control module through circuit VH219 (GY) to determine actual blower motor speed. When the highest blower motor setting is selected, the EATC module sends 12 volts to the blower control module through circuit CH217 (BN).

Possible Causes
• An open, short to voltage, ground or together in circuits CH218 (GN/VT), VH219 (GY) or circuit CH217 (BN)
• Blower motor control module
• EATC module
• If automatic HVAC system i would suspect Blower motor control module .

I would replace the blower motor resistor first then see if that corrects this. The resistor is located next to the blower motor under the dash.

You can get to it from the engine compartment, but you have to cut the cover off. There is an indented line showing where to cut. See picture below.

1. For the 3.1L engine, remove the alternator belt, then remove the alternator and position aside.
2. For the 2.5L and 3.3L engines, remove the power steering pressure hose from the power steering pump.
3. For the 3.0L engine, remove the serpentine belt.
4. For the 3.0L and 3.3L engines, remove the retaining bolts from the power steering pump bracket, then set the pump aside.
5. Detach the blower electrical connector, then, if accessible, remove the cooling tube.
   

When cutting the blower motor cover, make the cut just the thickness of the cover, which is1/ 8 inch (2mm) thick. Cutting deeper than that may damage the cooling tube.

For 1992-98 vehicles, partially cut the blower motor case cover, as shown on the cover. Cutting completely around the cover is NOT required. Swing the cut potion of the cover down.

1. If previously accessible, disconnect the cooling tube.
2. Unfasten the attaching screws/bolts and remove the blower motor from the case.

1. If necessary, remove the fan from the blower motor.
2. The installation is the reverse of the removal procedure.
3. If the case was cut during removal, secure the cover using the three retaining clips. Tighten the blower motor screws to 44 inch lbs. (5 Nm).
4. Connect the negative battery cable, then start the engine and check the blower motor for proper operation.

Removal

1. Remove the glove compartment liner to gain access to the heater blower motor and blower motor wheel assembly mounting screws.
   

1. Use a small screwdriver to remove clip retaining hydraulic damper strut.
   

1. Remove four screws and remove the heater blower motor assembly and blower motor wheel assembly from the heater blower motor housing.
   

Installation

1. Using a new seal, position the heater blower motor and blower motor wheel assembly to the heater blower motor housing with the flat side of the flange near the heater blower motor switch resistor (18591). Install the four retaining screws.
   

1. Tape the heater blower motor power lead to the air inlet duct to keep the wire away from the blower outlet during installation.
   

1. Install the heater blower motor and blower motor wheel assembly in the vehicle.
   

1. Install the glove compartment liner.
   

No, but it isn't too hard to get to under dash. I will paste instructions from autozone.com below. Pictures may not come thru.

CAUTION The Supplemental Inflatable Restraint (SIR) system must be disarmed before removing the blower motor assembly. Failure to do so may cause accidental deployment of the air bag, resulting in unnecessary SIR system repairs and/or personal injury.
Front Blower Motor
See Figures 1, 2 and 3

Fig. Fig. 1: The blower motor is located behind the glovebox, behind the blower motor cover

1. Disconnect and isolate the negative battery cable, then wait 2 minutes before proceeding with the removal. This will effectively disable the air bag system preventing possible personal injury.
2. Remove the glove box from the instrument panel.
3. Remove the A/C-heater blower motor cover.
4. Disconnect the blower motor wiring connector.
5. Remove the blower motor wiring grommet and feed the wiring through the blower motor housing.
6. Remove the blower motor mounting screws.

Fig. Fig. 2: Once the cover is removed, unplug the electrical connector and push it through the opening in the housing

Fig. Fig. 3: The blower motor is secured to the housing with three small screws

1. Allow the blower motor assembly to drop downward to clear the instrument panel and remove from vehicle.

To install:

1. Place the blower motor assembly into position on the A/C-heater unit and tighten the mounting screws.
2. Route the blower motor wiring through the blower motor housing and seat the wiring grommet in the hole of the blower motor housing.
3. Reconnect the blower motor electrical connector.
4. Install the A/C-heater blower motor cover.
5. Install the glove box into the instrument panel.
6. Reconnect the negative battery cable. Check blower motor operation.

Removal & Installation




The blower motor is located behind the glovebox, behind the blower motor cover

1. Disconnect and isolate the negative battery cable, then wait 2 minutes before proceeding with the removal. This will effectively disable the air bag system preventing possible personal injury.
   
2. Remove the glove box from the instrument panel.
   
3. Remove the A/C-heater blower motor cover.
   
4. Disconnect the blower motor wiring connector.
   
5. Remove the blower motor wiring grommet and feed the wiring through the blower motor housing.
   
6. Remove the blower motor mounting screws.
   

Once the cover is removed, unplug the electrical connector and push it through the opening in the housing



The blower motor is secured to the housing with three small screws

1. Allow the blower motor assembly to drop downward to clear the instrument panel and remove from vehicle.
   

To install:

1. Place the blower motor assembly into position on the A/C-heater unit and tighten the mounting screws.
   
2. Route the blower motor wiring through the blower motor housing and seat the wiring grommet in the hole of the blower motor housing.
   
3. Reconnect the blower motor electrical connector.
   
4. Install the A/C-heater blower motor cover.
   
5. Install the glove box into the instrument panel.
   
6. Reconnect the negative battery cable. Check blower motor operation.
   

Please don"t forget to rate:

Removal & Installation
CAUTION The Supplemental Inflatable Restraint (SIR) system must be disarmed before removing the blower motor assembly. Failure to do so may cause accidental deployment of the air bag, resulting in unnecessary SIR system repairs and/or personal injury.

1. Disconnect and isolate the negative battery cable, then wait 2 minutes before proceeding with the removal. This will effectively disable the air bag system preventing possible personal injury.
   
2. Remove the glove box from the instrument panel.
   

The blower motor is located behind the glovebox, behind the blower motor cover

1. Remove the A/C-heater blower motor cover.
   
2. Disconnect the blower motor wiring connector.
   
3. Remove the blower motor wiring grommet and feed the wiring through the blower motor housing.
   
4. Remove the blower motor mounting screws.
   

Once the cover is removed, unplug the electrical connector and push it through the opening in the housing


The blower motor is secured to the housing with three small screws

1. Allow the blower motor assembly to drop downward to clear the instrument panel and remove from vehicle.
   

To install:

1. Place the blower motor assembly into position on the A/C-heater unit and tighten the mounting screws.
   
2. Route the blower motor wiring through the blower motor housing and seat the wiring grommet in the hole of the blower motor housing.
   
3. Reconnect the blower motor electrical connector.
   
4. Install the A/C-heater blower motor cover.
   
5. Install the glove box into the instrument panel.
   
6. Reconnect the negative battery cable. Check blower motor operation.
   

Disconnect the negative battery cable (if you have an anti-theft radio, make sure you have the code).
The blower unit is located in the dash, behind the glove box.
Remove the glove box and the glove box frame(damping screws on the sides and two screws underneath).
If the car isn’t equipped with air conditioning, remove the heater duct between the heater core and the blower assembly housings. Then remove the three blower housing retaining nuts, pull the blower housing out far enough to unplug the electrical connectors (at the lower right edge, right above the kick panel) and remove the blower assembly housing.
If the car has air conditioning, remove the strap bolt, the blower under cover and the three blower housing retaining nuts, then remove the blower assembly as previously described.
If you are replacing the blower motor itself, or either of the blower fan wheels, remove the motor, remove the retaining clip(s) and remove the fan wheel(s).
Reverse procedure to install.
Hope this helps you.

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.

[email protected]

it's either the blower motor switch or blower motor resister. Resistor ?Heater Blower Motor Switch Removal Remove the battery (10655) ; refer to Section 414-01 . Remove the battery tray. Remove the screws. Remove the battery tray. Disconnect the heater blower motor switch resistor connector. Remove the heater blower motor switch resistor (18591). Remove the two screws. Remove the heater blower motor switch resistor. ----------------------------------- Switches Removal Disconnect the battery ground cable. Remove the center trim panel; refer to Section 501-12 . Remove the control assembly. Remove the screws. Remove the control assembly. Remove the A/C-heater function selector switch knob. Disconnect the vacuum harness connector. Disconnect the A/C-heater function selector switch connector. Remove the A/C-heater function selector switch. Remove the screw. Remove the A/C-heater function selector switch. Remove the temperature control switch knob. Disconnect the temperature control switch connector. Remove the temperature control switch. Remove the screw. Remove the temperature control switch. Remove the heater blower motor switch knob. Disconnect the heater blower motor switch connector. Remove the heater blower motor switch (18578). Remove the screw. Remove the heater blower motor switch. ----------------------------