To find the correct fuse and/or relay, you need to consult the owner's manual for your specific 1987 Ford van model (E-Series, Econoline, etc.). The manual will have a fuse box diagram showing the fuse ratings and what circuits they protect. It's possible the fuel pump is protected by a fuse in the underhood fuse box and/or an additional fuse or circuit breaker inside the cab.
Here's a general troubleshooting approach:
1. Consult your owner's manual: This is the most important step. The diagram will tell you where to look.
2. Check the underhood fuse box: Look for fuses labeled "fuel pump," "EFI," or something similar. Also, check for blown fuses that aren't clearly labeled, as a problem elsewhere might be causing this.
3. Locate the fuel pump relay: This is often found in the underhood fuse box or a separate relay center. The relay itself might not have a blown fuse, but may be faulty and need replacement. The relay's connections can also fail.
4. Check the inertia switch: This safety device cuts power to the fuel pump in a collision. It's usually located under the dash or in the engine compartment (location varies by model). Press the button to reset it if it's tripped.
5. Use a multimeter: If you can't find a blown fuse, use a multimeter to test the power and ground connections to the fuel pump, relay, and inertia switch. This can pinpoint where the problem is.
Important Safety Note: Work on the fuel system involves potential fire hazards. Disconnect the negative battery cable before working on any fuel system component.
