Fuel Pump Circuit Wiring Diagram (2002 4.0L V6 Ford Explorer And Mercury Mountaineer)

  • By: Abraham Torres-Arredondo
  • Created: 15 July 2025
  • Updated: 15 July 2025
  • Articl Id: 1840
PART 1 OF 2: 2002 4.0L V6 Ford Explorer And Mercury Mountaineer Fuel Pump Circuit Wiring Diagram PART 2 OF 2: 2002 4.0L V6 Ford Explorer And Mercury Mountaineer Fuel Pump Circuit Wiring Diagram

APPLIES TO: This fuel pump circuit wiring diagram applies to the following vehicles:

  • 4.0L V6 Ford Explorer: 2002.
  • 4.0L V6 Mercury Mountaineer: 2002.

The wiring diagram includes the following circuits:

  • PCM Power Relay.
  • Fuel Pump Relay.
  • Fuel Pump Inertia Switch.
  • Fuel Pump.

FUEL PUMP PRESSURE TESTS: If you haven't tested fuel pressure yet —or you're not sure if your fuel pump is delivering enough— this guide walks you through it step-by-step:

ENGINE NO-START DIAGNOSTICS: This guide walks you through the key systems to check when your engine cranks but refuses to start:

Related Fuel Pump Circuit Wiring Diagrams

These other fuel pump circuit wiring diagrams might help with what you’re working on:

More 4.0L V6 Ford Explorer/Mountaineer Wiring Diagrams And 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:

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