Coolant Temperature Switch
- Remove both switches from radiator hose flange. See Fig 1 . Place each switch individually in container of engine oil with thermometer. Heat engine oil slowly and check for continuity of switch with an ohmmeter.
- Continuity should be present in switch No. 1 at temperatures greater than 207°F (97°C). Continuity should be present in switch No. 2 at temperatures greater than 226°F (108°C). Replace switch(s) if not operating as described.
NOTE:
DO NOT heat engine oil above 248°F (120°C).