Troubleshooting

1. If coolant temperature is below 172°F on 3E engines or below 181°F on 3E-E engines, proceed as follows:
a. Turn ignition switch on and ensure cooling fan is not operating.
b. If fan is operating, check for faulty fan relay and/or temperature switch. Check too for separated electrical connectors or severed wire between relay and temperature switch.
c. Disconnect temperature switch wire, then check that fan rotates.
d. If fan does not rotate, check fan relay, fan motor, engine main relay and fuse. Check also for short circuit between fan relay and temperature switch.
e. Connect temperature switch wire.

2. If coolant temperature is above 190°F on 3E engines, or above 201°F on 3E-E engines, proceed as follows:
a. Raise engine temperature above 190°F on 3E engines and above 201°F on 3E-E engines, then check that fan rotates.
b. If fan does not rotate, replace temperature switch.
c. Allow coolant temperature to drop below 172°F on 3E engines or below 181°F on 3E-E engines. Fan should stop rotating.
d. If fan does not stop rotating, replace temperature switch.