For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Engine Cooling Schematics . Connector End View Reference: Component Connector End Views . DEFINITION: One or both engine cooling fan motors run continuously in high or low speed.
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go To Diagnostic System Check - Vehicle
2 | Ignition ON, engine OFF. Are both cooling fans operating at low speed? | Go to Step 4 | Go to Step 3
3 | Is the left cooling fan operating at high speed? | Go to Step 5 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
4 | Remove the low speed fan relay. Did the fans turn OFF? | Go to Step 6 | Repair the cooling fan motor supply voltage circuit of the right cooling fan for a short to voltage. Refer to Wiring Repairs .
5 | Remove the high speed fan relay. Did the left cooling fan turn OFF? | Go to Step 7 | Repair the cooling fan motor supply voltage circuit of the left cooling fan for a short to voltage. Refer to Wiring Repairs .
6 | Inspect for poor connections at the low speed fan relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | System OK | Replace the low speed fan relay.
7 | Inspect for poor connections at the high speed fan relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | System OK | Replace the high speed fan relay.