W 250 Pickup L6-359 5.9L DSL (1989)
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
Coolant Temperature Sensor Removal and Installation
WARNING: Wait until the temperature Is below 50°C [120°F] before removing the coolant system pressure cap. Failure to do so can cause personal
injury from heated coolant spray.
Drain the coolant system by opening the drain valve on the radiator. A drain pan with a capacity of 20 liters [5 U.S. gallons] will be adequate to hold the
coolant.
Disconnect the temperature sensor wiring. Clean the area around the sensor thoroughly.
Remove the temperature sensor.