The PCM activates the fuel pump based on various factors, including the ignition switch position and engine speed/load. There's no user-accessible switch to manually turn the pump on or off. Problems with the fuel pump itself, the fuel pump relay, wiring, or the PCM can prevent the pump from working.
If you're having fuel delivery problems, you shouldn't be looking for a fuel pump switch. Instead, focus on diagnosing these areas:
* Fuel Pump Relay: This is a common point of failure and is relatively easy to check and replace. Its location varies slightly by year, but a repair manual or online forum specific to your vehicle year will tell you where it is.
* Fuel Pump itself: The pump could be failing due to age or wear. Testing the pump usually involves checking the voltage at the pump connector while someone cranks the engine. Caution: This should only be done by someone familiar with automotive electrical systems.
* Wiring: Check for any damaged or corroded wiring leading to the fuel pump.
* PCM/ECM: A failing PCM is less likely but possible. This requires more advanced diagnostic tools.
Before attempting any repairs yourself, consult a repair manual specific to your 2001 Ford Explorer XLT. Improperly working with fuel system components can be dangerous. If you're not comfortable working on automotive electrical systems, it's best to take your vehicle to a qualified mechanic.
