W 100 Pickup L6-225 3.7L (1984)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Coolant Temperature Switch
Fig. 3 Switches & sensors location. In-Line 6 cylinder engine
On In-line six cylinder engines, the coolant switch is located on the front of the cylinder head, Fig. 3. It supplies a signal to the computer when the
engine coolant temperature is below 150° F. This information is required to prevent a change in air fuel ratio until engine operating temperature is
reached.
