For 1990-2009 cars

### Blower Motor Relay

Use the blower motor relay in order to provide battery voltage to the blower motor only during high blower motor speed. Use the blower motor resistor in order to provide power to the blower motor at all other speed settings. The blower motor relay is located under the instrument panel. Refer to Blower Motor Relay Replacement .

### Air Conditioning Compressor Relay

Use the A/C compressor relay in order to provide battery voltage to the compressor clutch coil. The powertrain control module (PCM) controls the relay. The relay is located in the underhood electrical center. Refer to Compressor Relay Replacement .