Blower motor switch. Compressor

Blower motor switch

FRONT

DESCRIPTION

The heater-A/C blower motor is controlled by a four position rotary-type blower motor switch, mounted in the heater-A/C control panel. The switch allows the selection of one of four blower motor speeds, but can only be turned off by selecting the Off position with the heater-A/C mode control switch knob.

OPERATION

The blower motor switch directs the blower motor ground path through the mode control switch to the blower motor resistor, or directly to ground through the high speed blower motor relay, as required to achieve the selected blower motor speed.

The blower motor switch cannot be repaired and, if faulty or damaged, the entire heater-A/C control unit must be replaced. The blower motor switch knob is serviced separately.

REAR

DESCRIPTION

The optional rear overhead A/C unit blower motor is controlled by a four position rotary-type blower motor switch, mounted by a snap fit in a hole in the headliner over the right front seat back. The switch allows the selection of one of three blower motor speeds and an Off position. The blower motor switch directs the blower motor ground path through the blower motor resistor.

OPERATION

The blower motor switch cannot be repaired and, if faulty or damaged, the entire switch unit must be replaced. The blower motor switch has a replaceable incandescent-type illumination lamp bulb.

Compressor

DESCRIPTION

The air conditioning system uses a Sanden SD7H15 seven cylinder, reciprocating wobble platetype compressor on all models. This compressor has a fixed displacement of 150 cubic centimeters (9.375 cubic inches), and has both the suction and discharge ports located on the cylinder head. A label identifying the use of R-134a refrigerant is located on the compressor.

OPERATION

The compressor is driven by the engine through an electric clutch, drive pulley and belt arrangement.

The compressor is lubricated by refrigerant oil that is circulated throughout the refrigerant system with the refrigerant.

The compressor draws in low-pressure refrigerant vapor from the evaporator through its suction port. It then compresses the refrigerant into a high-pressure, high-temperature refrigerant vapor, which is then pumped to the condenser through the compressor discharge port.

The compressor cannot be repaired. If faulty or damaged, the entire compressor assembly must be replaced. The compressor clutch, pulley and clutch coil are available for service.