The main fan motor is mounted on the left side of the radiator/condenser assembly. The fans run at low speed (series configuration) when the A/C is operating and the engine coolant temperature (ECT) is below 83°C (181°F). The fans run at high speed (parallel configuration) when the ECT is above 93°C (199°F).

A short to ground in the ground circuit of the A/C fan no. 1 and 2 relays will cause both fans to be inoperative once the ECT reaches 93°C (199°F). This table assumes that the auxiliary (right side) fan motor is functioning normally.

The following are symptoms and possible causes.

Did you perform the HVAC System Check?

Go to Step  2

Go to HVAC System Check

1. Run the engine until operating temperature is reached and the thermostat opens.
2. Stop the engine.
3. Exchange the fan no. 1 relay with a known good relay (the fan no. 3 relay, the A/C MG relay, or the horn relay).
4. Start the engine.

Does the main fan operate?

Go to Step  16

Go to Step  3

1. Stop the engine.
2. Disconnect the main fan motor connector.
3. Connect a test lamp across the main fan motor connector.
4. Start the engine.

Does the test lamp light?

Go to Step  4

Go to Step  5

Replace the main fan motor. Refer to Engine Cooling Fan Replacement in Engine Cooling.

Is the repair complete?

Go to HVAC System Check

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Test for an open in the WHT/BLK wire between the main fan motor terminal 1 and G103.

Is an open present?

Go to Step  18

Go to Step  6

Test for an open in the BLK/RED wire between the main fan motor terminal 2 and the fan no. 1 relay terminal 23. Refer to

Fuse and Relay Block 1

Go to Step  7

Go to Step  8

1. Test for an open in the BLK/RED wire between the main fan motor terminal 2 and connector 3 terminal 1 of fuse and relay block 1.
2. Test for an open between the fan no. 1 relay terminal 23 and connector 3 terminal 1 of fuse and relay block 1.

Is the BLK/RED wire open?

Go to Step  18

Go to Step  15

Test for battery voltage at the fan no. 1 relay terminal 22. Refer to

Fuse and Relay Block 1

Go to Step  16

Go to Step  9

Test for an open between terminal 22 of the fan no. 1 relay and terminal 14 of the engine main relay in fuse and relay block 1.

Is an open present?

Go to Step  15

Go to Step  10

Test for battery voltage at terminal 16 of the engine main relay.

Is battery voltage present?

Go to Step  12

Go to Step  11

Test for an open in the BLK/YEL wire between fuse and relay block 1 and fuse and relay block 2 OR in the BLK/YEL wire between fuse and relay block 2 and junction block 2. Refer to Wiring Repairs in Wiring Systems.

Is an open present?

Go to Step  18

Go to Step  15

Test for battery voltage at terminal 13 of the engine main relay.

Is battery voltage present?

Go to Step  14

Go to Step  13

Test for an open in the WHT wire to connector 4 terminal 2 of fuse and relay block 1.

Is an open present?

Go to Step  18

Go to Step  15

Test for an open in the WHT/BLK wire between fuse and relay block 1 and G103.

Is an open present?

Go to Step  18

Go to Step  17

Replace fuse and relay block 1. Refer to Underhood Fuse Block Replacement in Engine Electrical.

Is the repair complete?

Go to HVAC System Check

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Replace the fan no. 1 relay. Refer to Cooling Fan Relay Replacement .

Is the repair complete?

Go to HVAC System Check

--

Replace the engine main relay. Refer to Cooling Fan Relay Replacement .

Is the repair complete?

Go to HVAC System Check

--

Repair the open. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to HVAC System Check

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