Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Cooling Fan System Check performed? | -- | Go to Step 2 | Go to the Cooling Fan System Check |
2 |
Does the fan motor run? | -- | Go to Step 3 | Go to Step 4 |
3 | Repair the short to voltage in the BLK/RED wire between the fan motor terminal 2 and fuse relay block 1. Is the repair complete? | -- | Go to the Cooling Fan System Check | -- |
4 | Test for an open in the BLU/BLK wire between the fan no. 1 relay in fuse and relay block 1 and fuse and relay block 2. Is an open present? | -- | Go to Step 8 | Go to Step 5 |
5 | Test for an open in the LT GRN wire between fuse and relay block 2 and the fan control switch. Is an open present? | -- | Go to Step 8 | Go to Step 6 |
6 | 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 7 | Go to Step 9 |
7 | Replace the fan no. 1 relay. Refer to Cooling Fan Relay Replacement . Is the repair complete? | -- | Go to the Cooling Fan System Check | -- |
8 | Repair the open/short. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to the Cooling Fan System Check | -- |
9 | Replace the fan control switch. Refer to Engine Cooling Fan Control Switch Replacement . Is the repair complete? | -- | Go to the Cooling Fan System Check | -- |
