If it blows only on high speed, it is the resister.
If it does not work at all, check fuses first. See owner manual for location.
Then check blower motor by jumping 12 volts from battery to blower motor. Make sure ground is jumped too.
If it works now, it's the control panel. If not, it is the motor.
Blower Motor —Front
Removal and Installation
- Prepare the vehicle for blower motor (19805) removal.
- Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
- Remove the air cleaner assembly. For additional information, refer to Section 303-12 .
- Detach the speed control servo.
- Disconnect the electrical connector.
- Remove the bolt.
- Position the speed control servo aside.
- Position the coolant expansion tank/windshield washer reservoir aside.
- Remove the screws and the nuts.
- Position the coolant expansion tank/windshield washer reservoir aside.
- Remove the blower motor.
- Disconnect the vent hose.
- Disconnect the electrical connector.
- Remove the four screws.
- Remove the blower motor.
Also,
Heater Blower Motor Switch Resistor(s)
The front heater blower motor switch resistor has the following features:
- The assembly is located in the engine compartment on the evaporator housing (19850) next to the blower motor assembly (19805).
- Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
- Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
- An overheating device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except high.
- The thermal limiter cannot be reset and is not serviceable.
the problem was fixed on my vehicle by replacing the heater control resistor. Also the fix for the heater direction control was to replace hose leading to the switch through the firewall.
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