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Is there a fuel pump relay switch on 1990 ford aerostar?

Yes, there is a fuel pump relay switch on the 1990 Ford Aerostar. It is located in the fuse box under the hood of the vehicle. The relay switch is responsible for providing power to the fuel pump, which pumps fuel from the gas tank to the engine. If the relay switch fails, the fuel pump will not be able to operate and the engine will not be able to start.