Where is fuel pump relay on 90 ford econoline 4.9 liter?

On a 1990 Ford Econoline with a 4.9-liter engine, the fuel pump relay is typically located in the engine compartment fuse box. It's a small rectangular relay that can be identified by the diagrams on the fuse box cover. If you're having trouble locating it, you can also refer to the vehicle's service manual for specific diagrams and details. Be sure to check the connections and the relay's functionality if you're experiencing fuel pump issues.