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Rover Resources Center

A/C & Heater Blower Motor Resistor for Range Rover Classic 1990 - 1994

Applies To:

Item: PRC8010
Fits: Range Rover Classic | '90 - '94

The A/C and Heater Blower Motor Resistor controls the speed of the blower motor and the force of the airflow out of the dash vents. You select the level from your dash instrument controls, but this resistor is what enables those controls and regulates the power to the blower motor. This Atlantic British exclusive design is actually an improvement over the genuine resistor. It features a thermal-sink aluminum mounting plate that dissipates circuit heat effectively. The genuine version required air cooling available only when the vehicle was moving - sitting idle for any length of time with the heat or A/C on caused the genuine resistor to overheat and fail.

Location: The stock resistor is located under the cowl, just to the left of the right hood hinge. The plug for the resistor is located inside the truck to the right of the heater box.

Tools Required:
  • Flat Blade Screwdriver (for prying air intake grill off)
  • Long Phillips Screwdriver (10 to 12 inches long, or 1/4 inch drive socket with extension and Phillips bit)
  • 1/4 inch drive socket with 12 inch extension and 1/4 inch hex socket (installing PRC8010)

Section I - Replacing the Resistor:

1. Remove the center and right side air intake grills by removing the rectangular covers and pry the grills out. Remove the foam filters.

  • You should see the original resistor (it will look different than the improved replacement.)
  • It may be necessary to remove the brackets and cross bar for the foam filters to gain access the resistor (drill out the rivets)

2. The resistor is held by two Phillips screws. They can be removed with a long screw driver positioned through the center air intake and through the hole for the right hood hinge. You may find it easier to use a 1/4 inch drive ratchet with a long extension with a Phillips bit instead of a screwdriver.

3. Once the resistor is free, remove the grommet where the harness goes through the firewall. Then pull the harness until you can access the red plug connector and disconnect the old resistor from the red connector.

4. **Note: On certain vehicles, you may not be able to reach and pull out the red connector harness to disconnect it. If this is the case, You can choose from two alternative installation methods:

Section II - Removing The Dash Top for Installation


Section III - Splicing In New Resistor

5. Feed the resistor harness back into the hole and re-install the grommet. Secure the resistor (using the bolts supplied) to the bracket that held the original resistor.

6. Replace the brackets if removed and rivet in place. Re-install the foam filter and the air intake plastic grill.

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