Chrysler Front Wheel Drive Cars 4-CYL 1981-1995 Repair Information

Engine Cooling Fan

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REMOVAL & INSTALLATION



Except Premier

See Figures 1 through 8

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Fig. Fig. 1: Electric fan motor and related components' locations-1981-87 except Premier models and 1989-90 TC by Maserati models



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Fig. Fig. 2: The electric cooling fan is retained to the motor shaft by a clip-1981-87 except Premier models and 1989-90 TC by Maserati models



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Fig. Fig. 3: The cooling fan is mounted on the radiator by retaining clips or screws-1988-95 except Premier models (dual fan models similar)



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Fig. Fig. 4: The fan blade for 1988-95 except Premier models is also held onto the motor shaft by a retaining clip



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Fig. Fig. 5: Electric fan motor electrical connector terminal identification-1988-95 models (except TC by Maserati)



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Fig. Fig. 6: Detach the electric cooling fan connector ...



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Fig. Fig. 7: ... remove the cooling fan shroud attaching bolts, then ...



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Fig. Fig. 8: ... lift the fan and shroud assembly out of the engine bay

All models use electric motor driven cooling system fans. The fan modules include a motor support which may (depending on the model) include a shroud. The module is fastened to the radiator by screws with U-nuts and retaining clips.

The Dynasty models utilize a dual fan module. The dual fan module is a combination of 2 fans (mounted in a one piece shroud) which are simultaneously activated. The dual fan system improves engine cooling and air conditioning performance in hot weather and severe driving conditions, while reducing fan noise and power consumption.

There are no repairs which can be made to the fan. If the fan is warped, cracked, or otherwise damaged, it must be replaced.

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Disconnect the electric motor lead.
  4.  
  5. Remove the fan module-to-radiator fasteners and retaining clips.
  6.  
  7. Remove the assembly form the radiator support.
  8.  
  9. To remove the fan from the motor shaft, support the motor and motor shaft on a bench, while removing the fan retaining clip. This will help avoid damage to the shaft and motor by excessive force. Surface or burr removal may be required to remove the fan from the motor shaft. Do not permit the fan blades to touch the bench.
  10.  

To install:
  1. Slide the fan onto the motor shaft. Support the motor and shaft as above while installing the fan's retaining clip.
  2.  
  3. Install the assembly into the pocket on the lower radiator tank.
  4.  
  5. Attach the retaining clips and fasteners to the radiator tank.
  6.  

The right-side fastener is longer on A/C equipped vehicles.

  1. Connect the fan motor lead to the fan motor.
  2.  

Premier

See Figure 9

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Fig. Fig. 9: Cooling fan electrical system schematic

The cooling fan are turned on when the contacts of the cooling fan relay close and supply battery voltage to the motor from a fusible link. The cooling fan will turn on if the engine coolant temperature is above 188°F (87°C) or if the air conditioning compressor is turned on.

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Remove the support bracket screws, vibration cushion nuts, and radiator upper crossmember mounting bolts.
  4.  
  5. Remove the crossmember.
  6.  
  7. Unplug the fan motor wire connector from the engine wiring harness.
  8.  
  9. Remove the cooling fan/shroud assembly mounting screws.
  10.  
  11. Remove the fan assembly by lifting upward.
  12.  

To install:
  1. Lower the fan and shroud assembly into place, ensure that the tabs at the bottom of the fan shroud fit into the retaining clips.
  2.  
  3. Install the fan/shroud assembly mounting bolts. Tighten the bolts to 84 inch lbs. (9 Nm).
  4.  
  5. Connect the fan motor electrical wiring.
  6.  
  7. Install the crossmember and tighten the mounting bolts, vibration cushion nuts and support bracket bolts.
  8.  
  9. Connect the negative battery cable.
  10.  

TESTING



Premier

See Figures 9 through 13

Refer to the illustrations for terminal locations during the test procedure.

If the cooling fan does not operate with the A/C on, but the A/C compressor operates, repair the open circuit between terminal 5 of the cooling fan relay connector and the A/C clutch relay.

  1. To test the cooling fan temperature switch, turn the ignition switch to the RUN position.
    1. Connect a jumper wire between the coolant temperature switch terminals A and B . The cooling fan should operate.
    2.  
    3. If the cooling fan operates-replace the cooling fan temperature switch with a new one.
    4.  
    5. If the cooling fan does not operate-check the cooling fan relay, proceed to the next step.
    6.  

  2.  
  3. To test the cooling fan relay, keep the ignition switch in the RUN position and keep the relay plugged in.
  4.  



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Fig. Fig. 10: Coolant temperature sensor schematic



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Fig. Fig. 11: Engine cooling fan motor schematic



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Fig. Fig. 12: Engine fan relay schematic



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Fig. Fig. 13: Engine controller 60-way connector from the terminal end-all vehicles

  1. Connect a jumper wire between the coolant temperature switch terminals A and B .
  2.  
  3. Check the voltage at the cooling fan relay connector terminal 5 .
  4.  
  5. If battery voltage is present-proceed to the Step 3.
  6.  
  7. If battery voltage is not present, repair the open circuit between terminal 5 and the ignition switch.
  8.  

  1. Test the voltage at the cooling fan relay connector terminal 4 .
    1. If battery voltage is present, proceed to Step 4.
    2.  
    3. If battery voltage is not present, repair the open circuit between terminal 4 and the fusible link.
    4.  

  2.  
  3. Check the voltage at the cooling fan relay connector terminal 2 .
    1. If zero voltage is present, proceed to Step 5.
    2.  
    3. If zero voltage is not present, repair the open circuit to ground.
    4.  

  4.  
  5. Check for voltage at the cooling fan connector terminal 1 .
    1. If battery voltage is present, proceed to Step 6.
    2.  
    3. If battery voltage is not present, replace the cooling fan relay with a new one.
    4.  

  6.  
  7. Inspect the connections at the cooling fan motor for a clean tight fit.
    1. If connections are OK, replace the cooling fan with a new one.
    2.  
    3. If the connections are not OK, repair or replace the connections with new ones.
    4.  

  8.  

Except Premier

See Figures 1, 5, 13, 14 and 15

1981-87 MODELS
  1. Disconnect the negative battery cable.
  2.  
  3. Disengage the electric fan motor connector, then, using 14 gauge jumper wires, attach the fan terminals to a good 12 volt battery. Make sure to attach the positive fan terminal to the positive battery terminal and the negative fan terminal to the negative battery terminal. Refer to the illustrations for the identification of the fan motor wire connector terminals.
  4.  
  5. The fan should turn on and run normally. If the fan does not turn on, double check the jumper wire connections and polarity (negative to negative and positive to positive).
  6.  
  7. If the fan still does not function normally, replace it with a new unit, as described earlier in this section.
  8.  
  9. If the motor is noticeably overheated (i.e. wire insulation is melted, motor is charred, etc.) the system voltage may be too high. The voltage regulator may be defective.
  10.  
  11. After testing, attach the fan motor connector to the wiring harness.
  12.  
  13. Connect the negative battery cable.
  14.  

1988-95 MODELS

To check out the electric fan motor, disconnect the fan motor wire connector and connect it with 14 gauge wires to a good 12 volt battery observing the correct polarity. If the fan runs normally, the motor is functioning properly. If not, replace the fan module with a new one using the removal and installation procedures. If the motor is noticeably overheated (i.e. wire insulation melted, motor charred) the system voltage may be too high.

  1. For this system diagnostic test, the following tools will be needed:
    1. Diagnostic tool DRB II or the equivalent.
    2.  
    3. Volt/ohmmeter.
    4.  
    5. Refer to Chassis Electrical for general circuit testing procedures and wiring diagrams.
    6.  

  2.  
  3. Run the engine until the normal operating temperature is reached.
  4.  
  5. Check the wiring connectors for proper engagement.
  6.  
  7. Using the diagnostic tool, plugged into the diagnostic connector rearward of the battery, check the On-Board Diagnostics (OBD) in the Engine Controller for fault codes. Refer to Driveability & Emission Controls for more details regarding diagnostic trouble codes.
  8.  
  9. If the fault code 88-12-35-55 is detected, proceed to the next step.
  10.  
  11. With the ignition switch in the RUN position, test for battery voltage (single pin connector) at the fan relay. If the voltage reading shows battery voltage, proceed to Step 7. If the voltage is only 0-1 volt, proceed to Step 8.
  12.  
  13. With the ignition switch OFF , disconnect the 60-way connector from the Engine Controller (outboard of the battery) and return the ignition to the RUN position. Test for battery voltage at cavity 31 of the 60-way connector. If the reading shows battery voltage, replace the Engine Controller. If the voltage reading shows 0 volts, repair the open or short in the C27 circuit.
  14.  
  15. With the ignition OFF , disconnect the 60-way connector from the Engine Controller (outboard of the battery) and return the ignition to the RUN position. Test for battery voltage at the single pin connector at the fan relay. If the voltage shows battery voltage, replace the Engine Controller. If the voltage reading is only 0-1 volt, proceed to Step 9.
  16.  



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Fig. Fig. 14: Radiator fan motor schematic-except Premier



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Fig. Fig. 15: Radiator fan relay schematic-except Premier

  1. With the ignition in the RUN position, test for battery voltage at the wire ( C27 ) in the 3-way connector of the fan relay. If the voltage reading shows battery voltage, replace the fan relay. If the voltage reading is 0 volts, repair the open or short in the C27 circuit.
  2.  
  3. Turn the ignition OFF , connect the 60-way connector at the Engine Controller and test the system.
  4.  

 
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