Automatic Level Control (ALC) Compressor Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12015788 4 Way F Weather Pack (BLK)
Pin	Wire Color	Circuit No.	Function
A	WHT	320	Automatic Level Control Exhaust Solenoid Control
B	DK GRN	322	Automatic Level Control Compressor Motor Supply Voltage
C	RED	1342	Battery Positive Voltage
D	BLK	1050	Ground