Radiator Cooling Fan Temperature Sensor / Switch: Testing and Inspection

Fig. 29 Engine Coolant Temperature Switch Test:

1. Suspend engine coolant temperature switch in a container of coolant, Fig. 29.

Engine Coolant Temperature Switch Test:

1. Refer to Fig. 30 for diagnostic chart.

Fig. 31 Engine Coolant Temperature Switch Continuity Check:

2. Heat coolant and check for continuity at switch terminals A and B, then compare results with Fig. 31.