Left Hand Drive

When the A/C-heater control switch is moved to an A/C position or the defrost position, the Powertrain Control Module (PCM) receives the A/C select signal on circuit C90. Circuit C90 connects to cavity 28 of the PCM.

Circuit also C90 splices to the low pressure switch and to supply battery voltage to the coil side of the A/C compressor clutch relay. If the low pressure switch is closed, circuit C90 connects to circuit C21. Circuit C21 supplies battery voltage to the A/C cycling switch. Circuit C91 from the A/C cycling switch provides the A/C request signal to the PCM. Circuit C91 connects to cavity 27 of the PCM. Circuit Z1 provides ground for the A/C cycling switch.

After receiving the A/C request signal, the PCM supplies ground for the A/C compressor clutch relay on circuit C13. Circuit F12 from fuse 11 in the PDC supplies battery voltage to the contact side of the A/C compressor clutch relay. When the PCM grounds the relay, the contacts close and connect circuit F12 to circuit C3. Circuit C3 feeds the A/C compressor clutch.

Also, after receiving the A/C request signal, the PCM supplies ground for the coil side of the radiator fan relay on circuit C27. Circuit C27 connects to cavity 31 of the PCM. Circuit F12 supplies battery voltage to the coil side of the relay

When the PCM grounds the coil side of the radiator fan relay, the contacts close and connects circuit F141 from fuse 4 in the PDC to circuit C25. Circuit C25 feeds the radiator fan motor. Circuit Z1 provides ground for the motor.