How do you test the fuel pump relay for a 91 Buick Roadmaster?

To test the fuel pump relay on a 1991 Buick Roadmaster, first locate the relay in the fuse box under the dashboard or in the engine compartment. Use a multimeter to check for continuity by disconnecting the relay and testing the terminals; there should be continuity between the terminals when the relay is energized. Alternatively, you can swap it with a similar relay in the fuse box to see if the fuel pump operates. If the relay is faulty, it should be replaced.