Pressure Switch (Dual Switch): Inspection

NOTE: Pressure switch is attached to receiver dryer. It has two built-in switches.

Fig 1: Identifying Pressure Switch

1. Remove cap from high-pressure line service valve, and connect gauge manifold to service valve.
2. Disconnect pressure switch harness connector, and check pressure switch for proper ON-OFF operation. Use a circuit tester.
   Fig 2: Checking Pressure Switch For Proper On-Off Operation