After the fuel tank was dropped and reinstalled, check the fuses first. Replace any blown fuse and see if it blows again, which would indicate a short. Inspect the tank wiring and fuel lines for pinching. Reset the inertia switch, usually a red button in the trunk (confirm the location in the owner's manual), by pressing it down. If the fuses, relay, and inertia switch are good but the pump still does not run, trace the wiring back to the pump using a wiring diagram. If the pump later runs and the engine will run with fuel added at the throttle body, check whether the fuel injectors are firing.
The owner of a 1987 Ford Cougar with 182,000 miles dropped the fuel tank to seal it with JB Weld. After reinstalling it, no fuel reaches the filter or the rest of the system. The relay clicks when the key is turned, but the fuel pump does not run. Experts advised checking fuses for a short, inspecting for pinched wires or fuel lines from the tank work, resetting the inertia switch, and tracing the pump wiring with a diagram. If the pump later works, they also suggested verifying that the injectors are firing.
