

APPLIES TO: This fuel pump circuit wiring diagram applies to the following vehicles:
- 1993, 1994 4.0L Ford Explorer.
The wiring diagram includes the following circuits:
- PCM Power Relay.
- Fuel Pump Relay.
- Fuel Pump Inertia Switch.
- Fuel Pump.
FUEL PUMP PRESSURE TESTS:
FUEL PUMP INERTIA SWITCH DIAGNOSTICS: These step-by-step guides will show you how to test the fuel pump inertia switch.
- Fuel Pump Inertia Switch Tests (1991-2010 4.0L V6 Ford Explorer, Aerostar, And Mercury Mountaineer).
- Power To Fuel Pump Check (1991-2010 4.0L V6 Ford Explorer, Aerostar, And Mercury Mountaineer).
ENGINE NO-START DIAGNOSTICS:
Related Fuel Pump Circuit Wiring Diagrams
These other fuel pump circuit wiring diagrams might help with what you're working on:
- Fuel Pump Circuit Wiring Diagram (1995 4.0L V6 Ford Explorer).
- Fuel Pump Circuit Wiring Diagram (1996 4.0L V6 Ford Explorer).
- Fuel Pump Circuit Wiring Diagram (1997 4.0L V6 Ford Explorer).
- Fuel Pump Circuit Wiring Diagram (1998-2001 4.0L V6 Ford Explorer).
- Fuel Pump Circuit Wiring Diagram (2002 4.0L V6 Ford Explorer And Mercury Mountaineer).
- Fuel Pump Circuit Wiring Diagram (2003 4.0L V6 Ford Explorer And Mercury Mountaineer).
- Fuel Pump Circuit Wiring Diagram (2004 4.0L V6 Ford Explorer And Mercury Mountaineer).
- Fuel Pump Circuit Wiring Diagram (2005 4.0L V6 Ford Explorer And Mercury Mountaineer).
- Fuel Pump Circuit Wiring Diagram (2006-2010 4.0L V6 Ford Explorer And Mercury Mountaineer).
More Ford 4.0L Wiring Diagrams And Diagnostic Test Tutorials
You can find a complete list of wiring diagrams and diagnostic test tutorials here:
Here's a sample of the tutorials you'll find there:
- How To Test The TPS (1997-2001 4.0L SOHC Ford Explorer).
- How To Test A Misfire Problem (1991-2010 4.0L V6 Ford Explorer, Aerostar, And Mercury Mountaineer).
- How To Test The Fuel Pump (1993-2000 4.0L V6 Ford Explorer, Aerostar, And Mercury Mountaineer).
- How To Test Engine Compression (1991-2010 4.0L V6 Ford Explorer, Aerostar, And Mercury Mountaineer).

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