Radiator Fan Control Module

Perform test with radiator fan control module 8-pin connector connected, ignition on and A/C switch OFF. See appropriate RADIATOR FAN CONTROL MODULE INPUT TESTS table. If cause of problem is discovered while performing tests, correct problem before continuing tests.

RADIATOR FAN CONTROL MODULE INPUT TESTS (2.3CL)

Pin No. (Wire Color)

Test Condition

Desired Results

1 (Yellow)

Check For Battery Voltage

⁽¹⁾ Battery Voltage

2 (Black/Yellow)

Check For Battery Voltage

⁽²⁾ Battery Voltage

3 (Yellow/White)

Check For Battery Voltage

⁽¹⁾ Battery Voltage

4 (Black)

Check For Voltage To Ground

⁽³⁾ Less Than One Volt

5 (White/Green)

Check For Voltage

⁽⁴⁾ About 11 Volts

6 (White)

Check For Battery Voltage

⁽⁵⁾ Battery Voltage

7 (Black/Yellow)

Check For Battery Voltage

⁽⁶⁾ Battery Voltage

8 (Green)

Connected To Body Ground

⁽⁷⁾ Condenser Fan & Radiator Fan Run

⁽¹⁾	Replace radiator fan control module. Before replacing module, check continuity between condenser fan relay Yellow/White wire and ground, and radiator fan relay Yellow wire and ground. Continuity should not exist.

⁽²⁾	Check fuse No. 8 (7.5-amp) in underdash fuse/relay block. If fuse is okay, repair open in Black/Yellow wire.

⁽³⁾	Repair open to ground.

⁽⁴⁾	Repair short to ground, faulty engine coolant temperature switch "B", or faulty radiator fan control module.

⁽⁵⁾	Check fuse No. 34 (15-amp) in underhood fuse/relay block. If fuse is okay, repair open in White wire.

⁽⁶⁾	Check fuse No. 4 (7.5-amp) in underdash fuse/relay block. If fuse is okay, repair open in Black/Yellow wire.

⁽⁷⁾

Check for an open in Green wire between radiator fan control module, condenser fan relay and radiator fan relay. If wire is okay, check for open Yellow/White wire between radiator fan control module and condenser fan relay, or open Yellow wire between radiator fan control module and radiator fan relay. If wires are okay, test condenser fan relay and radiator fan relay. See RELAYS under TESTING.

RADIATOR FAN CONTROL MODULE INPUT TESTS (3.0CL)

Pin No. (Wire Color)

Test Condition

Desired Results

1 (Yellow)

Check For Battery Voltage

⁽¹⁾ Battery Voltage

2 (Black/Yellow)

Check For Battery Voltage

⁽²⁾ Battery Voltage

3 (Yellow/White)

Check For Battery Voltage

⁽¹⁾ Battery Voltage

4 (Black)

Check For Voltage To Ground

⁽³⁾ Less Than One Volt

5 (White/Green)

Check For Voltage

⁽⁴⁾ About 11 Volts

6 (White/Yellow)

Check For Battery Voltage

⁽⁵⁾ Battery Voltage

7 (Black/Yellow)

Check For Battery Voltage

⁽⁶⁾ Battery Voltage

8 (Green)

Connected To Body Ground

⁽⁷⁾ Condenser Fan & Radiator Fan Run

⁽¹⁾	Replace radiator fan control module. Before replacing module, disconnect both fan relays. Check continuity between Yellow/White (or Yellow) wire and ground. Continuity should not exist.

⁽²⁾	Check fuse No. 8 (7.5-amp) in underdash fuse/relay block. If fuse is okay, repair open in Black/Yellow wire.

⁽³⁾	Repair open to ground.

⁽⁴⁾	Repair short to ground, faulty engine coolant temperature switch "B", or faulty radiator fan control module.

⁽⁵⁾	Check fuse No. 39 (7.5-amp) in underhood fuse/relay block. If fuse is okay, repair open in White/Yellow wire.

⁽⁶⁾	Check fuse No. 4 (7.5-amp) in underdash fuse/relay block. If fuse is okay, repair open in Black/Yellow wire.

⁽⁷⁾

Check for an open in the Green wire between radiator fan control module, condenser fan relay and radiator fan relay. If wire is okay, check for open Yellow/White wire between radiator fan control module and condenser fan relay, or open Yellow wire between radiator fan control module and radiator fan relay. If wires are okay, test condenser fan relay and radiator fan relay. SeeRELAYS under TESTING.