1991 1999 ford explorer chilton User Manual

FUEL TANK
Tank Assembly
REMOVAL & INSTALLATION Disconnect the negative battery cable and relieve the fuel system pressure.
1. 
Siphon or pump as much fuel as possible out through the fuel filler pipe.
2. 
Fuel injected vehicles have reservoirs inside the fuel tank to maintain fuel near the fuel pick-up during
cornering or low-fuel operation. These reservoirs could block siphon hoses or tubes from reaching the
bottom of the fuel tank. Repeated attempts, using different hose orientations, can overcome...

Exploded view of the Explorer/Mountaineer fuel filler assembly
Click to enlarge
HOW TO USE THIS BOOK
642 REMOVAL & INSTALLATION 

Exploded view of the Explorer/Mountaineer fuel tank assembly
Click to enlarge
HOW TO USE THIS BOOK
REMOVAL & INSTALLATION 643 

Exploded view of the Ranger fuel filler assembly and pump mounting
Click to enlarge
HOW TO USE THIS BOOK
644 REMOVAL & INSTALLATION 

Exploded view of the Ranger Super Cab fuel tank assembly
Click to enlarge
HOW TO USE THIS BOOK
REMOVAL & INSTALLATION 645 

Exploded view of the Ranger Regular Cab fuel tank assembly
Click to enlarge
To install: Before installation, it would be wise to perform the following:Double-check the tightness of the sending unit/fuel pump locking ring. If it is already loose,
now would be a good time to remove it and check the condition of the gasket underneath.
1. 
Ensure that all metal shields are reinstalled in their original positions and that the fasteners are
secure.
2. 
Be sure that the fuel vapor valve is completely installed...

If not already attached, connect the fuel hoses and lines. Make sure the fuel supply, fuel return (if
present) and the vapor vent attachments are made properly. If not already attached, connect the
sending unit.
17. 
If removed, install the fuel tank skid plate.
18. 
Lower the vehicle.
19. 
Fill the tank with fuel and check all connections for leaks.
20. 
Sending Unit
REMOVAL & INSTALLATION
Please refer to Fuel Pump, Removal & Installation.
Chilton® Automotive Information Systems. © 2004 Thomson Delmar...

UNDERSTANDING AND TROUBLESHOOTING
ELECTRICAL SYSTEMS
Basic Electrical Theory
For any 12 volt, negative ground, electrical system to operate, the electricity must travel in a complete circuit.
This simply means that current (power) from the positive (+) terminal of the battery must eventually return to
the negative (-) terminal of the battery. Along the way, this current will travel through wires, fuses, switches
and components. If, for any reason, the flow of current through the circuit is interrupted,...

electrons will split off the atom and look for another atom to balance out. If this imbalance is kept up,
electrons will continue to move and an electrical flow will exist.
Many people have been taught electrical theory using an analogy with water. In a comparison with water
flowing through a pipe, the electrons would be the water and the wire is the pipe.
The flow of electricity can be measured much like the flow of water through a pipe. The unit of measurement
used is amperes, frequently abbreviated...

Power (w) is equal to amperage (I) times voltage (E): W=I x E
This is only true for direct current (DC) circuits; The alternating current formula is a tad different, but since
the electrical circuits in most vehicles are DC type, we need not get into AC circuit theory.
Electrical Components
POWER SOURCE
Power is supplied to the vehicle by two devices: The battery and the alternator. The battery supplies electrical
power during starting or during periods when the current demand of the vehicles electrical...