* Inertia Switch: This is the most likely culprit. It's a safety device that cuts power to the fuel pump in a collision. It's usually a small, often red, switch located under the dash, sometimes under the hood (though less common on a 94 F150). If this has tripped, you'll need to locate it and press it to reset it. Look for labels that say "Inertia Switch" or something similar.
* Crash Data Retrieval Module (CDRM): In some vehicles, the system is more sophisticated and integrated into the vehicle's computer systems. A collision might trigger a fault code that needs to be cleared with a scan tool.
How to troubleshoot:
1. Check the Inertia Switch: This is the first and easiest thing to check. Locate the switch (consult your owner's manual or search online for its location in a 1994 F-150), and firmly press it. Sometimes it will click audibly. This action should reset it.
2. Check the Fuel Pump Relay: A faulty relay can also prevent the pump from working. This is a small electrical switch and they can be easily replaced.
3. Check the Fuel Pump Fuse: A blown fuse will also stop the pump. Check your fuse box for a fuse related to the fuel pump.
4. Scan for Diagnostic Trouble Codes (DTCs): If the above steps don't solve the issue, it's a good idea to have the vehicle scanned for any diagnostic trouble codes using an OBD-II scanner. This can pinpoint the exact problem.
If you're not comfortable working on your vehicle's electrical system, it's best to take it to a qualified mechanic. Incorrectly diagnosing and fixing electrical problems can be dangerous.
