REMOVAL & INSTALLATION
See Figure 1
- Disconnect the negative battery cable, then partially drain the engine cooling system to a level lower than the upper radiator hose.
- Remove the upper radiator hose to provide access for fan and motor assembly removal.
- Unplug the electrical connector(s) from the cooling fan motor. If multiple connectors are used, be sure to tag the wires before disconnecting.
- Remove the fan shroud mounting, then remove the fan/shroud assembly from the vehicle.
If necessary, disassemble the fan and motor for repair or replacement.
- Remove the fan blade-to-motor nut, then separate the fan blade and washer from the motor.
- Remove the motor-to-shroud bolts, then remove the the motor from the shroud.
- Test the fan motor and replace it, if necessary. Make sure the fan blades are free of damage or warpage and, replace if damaged.
- To install, reverse the removal procedures.
- Connect the negative battery cable and refill the cooling system, then start the engine and check for leaks and proper fan operation.
- Unplug the electrical wiring connector from the electric cooling fan.
- Using a 14 gauge wire, connect it between the fan and the positive terminal; the fan should run.
If the fan does not run while connected to the electrical wiring connector with the engine warm and running, inspect for a defective coolant temperature switch or air conditioning relay, if equipped.
- If the fan does not run when connected to the jumper wire, replace the fan assembly.
See Figure 2
- Unplug the wiring harness electrical connector from the cooling fan.
- Using an ammeter and jumper wires, connect the fan motor in series with the battery and ammeter. With the fan running, check the ammeter reading, it should be 5.8-7.4A, if the amp readings are not within specifications, replace the motor.
- Reconnect the wiring harness to the fan's electrical connector. Start the engine, allow it to reach temperatures above 194°F and confirm that the fan runs. If the fan doesn't run, test and/or replace the temperature switch.
THERMO SWITCH TESTING
See Figure 3
- Disconnect the negative battery cable and drain the engine cooling system. For the Spectrum, the system need only be drained to a level 1 / 2 way down the radiator, just below thermo switch mounted in the side of the radiator.
- Unplug the electrical connector and remove the thermo switch from the side or base of the radiator, as applicable.
- Suspend the a thermometer and the thermo switch in a pan containing a 50/50 mixture of ethylene glycol antifreeze and water. Do not let the switch or thermometer touch the bottom or sides of the pan to assure proper temperature readings.
- Place the pan on a burner and raise the temperature above 179°F (82°C). As the temperature rises, use an ohm meter to check switch continuity. The switch should close providing continuity only after the specified temperature has been reached.
- Replace the switch if it closes either too soon or too early.