Examination
1. The cooling fan motor is powered directly from the battery via a fuse and a relay. This relay (fan motor) - is supplied with switching voltage coming from the battery and the fuse link to the ignition relay (which is independently powered by switching voltage from the ignition switch) and from there to the 10 amp fuse. Through this fuse, which is actually labeled as the rear fog light system (rear window heating), power is supplied to the thermal switch installed on the radiator.
2. If the fan is suspected to be faulty, start the engine and warm it up to normal operating temperature, then set it to idle. If the fan does not come on within a few minutes, turn off the engine and disconnect the two wires from the thermal switch. Connect the two wires with a jumper wire and turn on the ignition. If the fan now works, the thermal switch is probably faulty and further testing is required (see Chapter 12).
3. If the fan still does not work, check that there is battery voltage on the two wires. If not, check the fuse and relay (see Section 12), or damage to the electrical wiring. If voltage is present, the fan motor is faulty:
4. The fan motor can be tested directly by disconnecting it from the wiring harness and connecting 12 volts directly to it. On cars with two-speed fans, remember that it is necessary to test not only the thermal switches, but also the resistance block mounted on the end of the motor using an ohmmeter. There should be some resistance, but it should not be too small (short circuit) not too big (open circuit). The resistance block can be replaced separately.
Removal and installation
5. On Turbo models, loosen the clamps securing the air intake and muffler assembly to the air flow meter and turbo generator, unscrew the assembly mounting brackets from the front panel, and disconnect the breather hose from the rocker arm cover. Remove the assembly and wipe the air flow meter and turbo generator openings with a clean, lint-free cloth.
6. On all vehicles, disconnect the negative battery cable.
7. Disconnect the electrical wiring from the cooling fan motor.
8. Unscrew the cooling fan and shroud or suspension assembly and remove them from the rear of the radiator.
9. The fan can be removed from the motor shaft by unscrewing the screws or nut.
10. Installation is carried out in the reverse order of removal.