Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Cooling Fan System Check performed? | -- | Go to Step 2 | Go to Cooling Fan System Check |
2 |
Does the test lamp light? | -- | Go to Step 3 | Go to Step 4 |
3 | Replace the fan motor. Refer to Engine Cooling Fan Replacement . Is the repair complete? | -- | Go to Cooling Fan System Check | -- |
4 | Test for an open in the WHT/BLK wire between the fan motor terminal 1 and G103. Is an open present? | -- | Go to Step 21 | Go to Step 5 |
5 | Test for an open in the BLK/RED wire between the fan motor terminal 2
and the fan no. 1 relay terminal 23. Refer to
Is an open present? | -- | Go to Step 6 | Go to Step 7 |
6 |
Is the BLK/RED wire open? | -- | Go to Step 21 | Go to Step 16 |
7 | Test for battery voltage at the fan no. 1 relay terminal 22
with the engine running. Refer to
Is battery voltage present? | -- | Go to Step 8 | Go to Step 10 |
8 | Test for a short to ground in the BLU/BLK wire between terminal 25 of fuse and relay block 1 and fuse and relay block 2. Is a short to ground present? | -- | Go to Step 21 | Go to Step 9 |
9 | Test for a short to ground in the LT GRN wire between fuse and relay block 2 and the fan control switch. Is a short to ground present? | -- | Go to Step 21 | Go to Step 17 |
10 | 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 16 | Go to Step 11 |
11 | Test for battery voltage at the ENGINE MAIN relay terminal 16
with the engine running. Refer to
Is battery voltage present? | -- | Go to Step 13 | Go to Step 12 |
12 | 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 21 | Go to Step 16 |
13 | Test for battery voltage at terminal 13 of the ENGINE MAIN relay with the engine running. Is battery voltage present? | -- | Go to Step 15 | Go to Step 14 |
14 | 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 21 | Go to Step 16 |
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 21 | Go to Step 20 |
16 | Replace fuse and relay block 1. Refer to Underhood Fuse Block Replacement in Engine Electrical. Is the repair complete? | -- | Go to Cooling Fan System Check | -- |
17 | Test the fan control switch. The fan control switch should be closed below 83°C (181°F) and open above 93°C (199°F). Is the fan control switch operating properly? | -- | Go to Step 19 | Go to Step 18 |
18 | Replace the fan control switch. Refer to Engine Cooling Fan Control Switch Replacement . Is the repair complete? | -- | Go to Cooling Fan System Check | -- |
19 | Replace the fan no. 1 relay. Refer to Cooling Fan Relay Replacement . Is the repair complete? | -- | Go to Cooling Fan System Check | -- |
20 | Replace the engine main relay. Refer to Cooling Fan Relay Replacement . Is the repair complete? | -- | Go to Cooling Fan System Check | -- |
21 | Repair the open/short. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Cooling Fan System Check | -- |
