Automatic Air Conditioning

P2 Pressure SW
1 - 4 : Open with the refrigerant pressure at less than approx. 216 kPa (2.2 kgf/sq.cm, 31 psi) or more than approx. 3138 kPa (32 kgf/sq.cm, 455 psi)

A13 A/C Control Assembly
B - Ground : Always approx. 12 volts
IG - Ground : Approx. 12 volts with ignition SW at ON or ST position
AIF - Ground : Approx. 12 volts with FRESH SW on
AIR-Ground : Approx. 12 volts with RECIRC SW on
GND-Ground : Always continuity.