R-12 Systems
| A/C Compressor Clutch Switch Closes Above Between two blue wires | 2.0 - 3.0 Bar (bar) |
| A/C Compressor Clutch Switch Opens Above Between two blue wires | 24.0 - 32.0 Bar (bar) |
| Radiator Cooling Fan Switch Closes Above Between red and black wires | 12.5 - 16.0 Bar (bar) |