Dual Pressure Switch

A3 A/C DUAL PRESSURE SW
1 - 4 : Open with the refrigerant pressure at less than approx. 196 kpa (2.0 kgf/sq.cm, 28.4 psi), or more than approx. 3140 kpa (32 kgf/sq.cm, 455 psi),

A7 (A), AB (B), A9 (C) A/C AMPLIFIER
(A) 8 - GROUND : Always approx. 12 volts
(A) 1 - GROUND : Approx. 12 volts with the ignition SW at ON position
(A) 24 - GROUND : Always continuity