How to Measure the Condition of a Car Blower Resistor?
1 Answers
Place the black probe in the corresponding position, with the black one in COM and the red one in the voltage position. Adjust the range to the DC voltage setting. DC voltage has positive and negative poles. The red probe measures the positive pole, and the black probe measures the negative pole. Adjust the multimeter range to the AC voltage setting, and place the red and black probes in their respective positions. AC measurements do not distinguish between positive and negative poles. If the above readings are normal, the blower resistor is functioning properly. If the resistance is 0 (no airflow) or there is no reading, the blower resistor is damaged.