Control Panel

The control panel actually consists of two components: the faceplate and the box containing the electrical connectors behind the faceplate. There is a series of low current switches behind the surface of the faceplate which transfers the control selection to a microprocessor in the control box. The microprocessor serves two functions, first to execute the desired selection through power transistors and, secondly to remember the last selection ordered and display that selection through the LEDs in the faceplate the next time the ignition switch is turned on.

There are three connecting bodies on the back of the control panel, 22, 6 and 8 pin connectors.

The 6 pin connector supplies B+ (battery feed) power, ignition switched power, in-vehicle sensor circuit power and back lighting power to the control panel faceplate. The 8 pin connector supplies power to all A/C components in the engine compartment, such as the blower motor controls and compressor. The 22 pin connector provides power feedback circuits to the motors of the actuator units.

The 22 pin connector supplies power and feedback to four vacuum solenoids in the programmer and to the temperature door electric actuator. The 6 pin connector supplies B+ (battery feed) power ignition switch power, in-vehicle sensor circuit power and back lighting power to the control panel faceplate. The 22 pin connector also supplies power to all A/C components in the engine compartment.