Simple Diagram

MCC/STD







2/22 A/C relay
3/57 Control module air conditioning system
4/46 Engine management system
6/28 Blower motor
6/48 Damper motor, recirculation
6/69 Damper motor, air distribution
7/8 Pressure sensor
7/53 Low-pressure switch (pressostat)
8/3 A/C compressor
20/18 Fan rheostat

The control module has 2 contactors marked A and B with 6 and 22 connections respectively.