Cooling Fan Inoperative
WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Cooling Fan Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Cooling Schematics Connector End View Reference: Cooling System Connector End Views DEFINITION: The engine cooling fan motor does not operate. |
|||
| 1 | Did you perform A Diagnostic System Check-Engine Cooling? | Go to Step 2 | Go to Diagnostic System Check - Engine Cooling |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
|
Go to Step 4 | Go to Step 7 |
| 4 | Connect a 20 A fused jumper wire between the battery positive voltage circuit of the cooling fan relay and the cooling fan motor supply voltage circuit of the cooling fan relay. Does the cooling fan operate? |
Go to Step 10 | Go to Step 5 |
| 5 |
|
Go to Step 6 | Go to Step 8 |
| 6 | Probe the harness connector of the cooling fan motor with a test lamp connected between the cooling fan motor supply voltage circuit and the ground circuit of the cooling fan motor. Does the test lamp illuminate? |
Go to Step 11 | Go to Step 9 |
| 7 | Repair the battery positive circuit of the cooling fan relay. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 14 | - |
| 8 | Repair the supply voltage circuit of the cooling fan motor. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 14 | - |
| 9 | Repair the ground circuit of the cooling fan motor. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 14 | - |
| 10 | Inspect for poor connections at the cooling fan relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 12 |
| 11 | Inspect for poor connections at the harness connector of the cooling fan motor. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 13 |
| 12 | Replace the cooling fan relay. Refer to Cooling Fan Relay Replacement . Did you complete the repair? |
Go to Step 14 | - |
| 13 | Replace the cooling fan motor. Refer to Cooling Fan Replacement - Electric . Did you complete the repair? |
Go to Step 14 | - |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |