To test the cooling fan on a 1995 Buick Park Avenue with a 3.8-liter engine, start by checking the fan fuse and relay to ensure they are functioning properly. Next, you can manually trigger the fan by connecting it directly to the battery; if it operates, the fan is good. Additionally, monitor the engine temperature while the vehicle is running; the fan should activate when the engine reaches a certain temperature. If it does not turn on, further diagnosis of the temperature sensor or fan control module may be necessary.
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