The resistor is used to select the fan operation mode. It has two spirals with a resistance of 0.23 and 0.82 ohms. By turning the knob on the heater control panel, you can turn on the engine power circuit or both coils (first speed), or a spiral with a resistance of 0.23 Ohm (second speed), or turn on the motor directly without a resistor (third speed).
You will need a screwdriver.
1. Disconnect the wire from the terminal «minus» battery.
2. To replace the resistor, unscrew its fastening screw.
3. Remove the resistor from the heater body. If the resistor coils are burned out, replace it.
4. Install the additional resistor in the reverse order of removal.