On a 1991 Buick Park Avenue with a 3800 series motor, the radiator cooling fan relay is typically located in the engine compartment, near the front of the vehicle. It is often mounted on or near the fuse box, close to the driver's side of the engine bay. You may also find it attached to the radiator support or near the cooling fan assembly itself. For precise location, consulting the vehicle's service manual or a repair guide can be helpful.
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