A/C Switch (SC400)
- Disconnect A/C switch. Install A/C manifold gauge set. Attach ohmmeter test leads to terminals No. 2 and 3. See Fig 1. Continuity should be present when system pressure is less than 178 psi (1226 kPa).
- Start engine. Turn A/C switch and blower switch on. Continuity should not be present when system pressure is more than 220 psi (1520 kPa). Replace A/C switch if values are not as specified.