Home >> Ford Truck >> 1983 >> Ranger 2WD L4-122 2.0L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Pinpoint Tests >> Pinpoint Tests >> 11.0 Thru 11.24 - Thermactor Air Switching >> 11.10, 11.20 & 11.21