How do you change the fuel filter on a 1989 ford F150 with dual tanks?

To change the fuel filter on a 1989 Ford F150 with dual tanks, first, relieve the fuel system pressure by removing the fuel pump relay and starting the engine until it stalls. Then, locate the fuel filter, which is typically found along the frame rail or near the fuel tank. Disconnect the fuel lines from the filter using appropriate tools, ensuring to catch any spilled fuel, and then remove the old filter. Install the new filter in the same orientation as the old one, reconnect the fuel lines, and replace the fuel pump relay before starting the engine to check for leaks.