The blown fuse you found in the passenger compartment likely controls something *else* entirely – accessories, lights, power windows, etc. It's a coincidence that it blew around the same time your fuel pump failed. The real problem is a separate issue causing the fuel pump to stop working (or the relay that controls it failing), and that is what needs to be diagnosed.
Possible causes for the fuel pump failure (and why you need to investigate, not just replace the passenger-compartment fuse):
* Fuel pump relay: This relay is responsible for sending power to the fuel pump. It could have failed, stuck open (rare), or is getting a bad signal.
* Fuel pump itself: The pump might have worn out or failed due to age or lack of fuel.
* Wiring to the fuel pump: There could be a break or short circuit in the wiring between the relay and the pump. This could be caused by rodents or wear and tear.
* Inertia switch: Some vehicles have an inertia switch (a safety device) that cuts power to the fuel pump in a collision. This may have tripped, though less likely if you haven't been in an accident.
* Low fuel level: An exceptionally low fuel level can sometimes cause issues with the pump.
* Fuel pump fuse (in the engine compartment): This is the most likely fuse directly responsible.
To fix this:
1. Check the engine compartment fuse box: Look for the fuel pump fuse (consult your owner's manual) and check if it is also blown. Replace it if necessary with one of the same amperage.
2. Check the fuel pump relay: Locate the fuel pump relay (again, check your manual). You might be able to swap it with another relay of the same type (as a test) to see if that solves the problem. If a swap fixes it, you've found your problem.
3. Inspect the wiring: Visually inspect the wiring harness leading to the fuel pump. Look for any signs of damage.
4. Check the inertia switch: If your truck has one, locate it (often under the dash) and reset it if it's tripped.
5. Check the fuel level: Ensure there's sufficient fuel in the tank.
Ignoring the engine compartment fuse box and focusing only on the passenger compartment fuse will not fix your fuel pump problem. Focus your attention on the engine compartment and the fuel pump system itself.
