1991 1999 ford explorer chilton User Manual

FIRING ORDERS
To avoid confusion, remove and tag the spark plug wires one at a time, for replacement.
If a distributor is not keyed for installation with only one orientation, it could have been removed previously
and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement
of the plug towers in relation to the engine. For this reason it is imperative that you label all wires before
disconnecting any of them. Also, before removal, compare the current...

2.3L, 2.5L Engines Distributorless ignition
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212 FIRING ORDERS 

1995-99 3.0L Engines Distributorless ignition
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FIRING ORDERS 213 

4.0L Engines Distributorless ignition
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214 FIRING ORDERS 

1996-99 5.0L Engines Distributorless ignition
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Chilton® Automotive Information Systems. © 2004 Thomson Delmar Learning. HOW TO USE THIS BOOK
FIRING ORDERS 215 

CHARGING SYSTEM
General Information
The charging system is a negative (-) ground system which consists of an alternator, a regulator, a charge
indicator, a storage battery, wiring connecting the components, and fuse link wire.
The alternator is belt-driven from the engine. Energy is supplied from the alternator/regulator system to the
rotating field through two brushes to two slip-rings. The slip-rings are mounted on the rotor shaft and are
connected to the field coil. This energy supplied to the...

Exploded view of the alternator. Note the fan is externally mounted, however, internal mount fans are also used
Click to enlarge
The battery is connected to the alternator at all times, whether the ignition key is turned ONor not. If the
battery were shorted to ground, the alternator would also be shorted. This would damage the alternator. To
prevent this, a fuse link is installed in the wiring between the battery and the alternator. If the battery is
shorted the fuse link melts, protecting the...

Do not short across or ground any of the terminals on the AC generator.
· 
The polarity of the battery, generator, and regulator must be matched and considered before making
any electrical connections within the system.
· 
Never operate the alternator on an open circuit. make sure that all connections within the circuit are
clean and tight.
· 
Disconnect the battery terminals when performing any service on the electrical system. This will
eliminate the possibility of accidental reversal of polarity.
·...

Battery Load Test
With the engine running, turn the air conditioner ON (if equipped) or the blower motor on high speed
and the headlights on high beam.
1. 
Have your assistant increase the engine speed to approximately 2000 rpm.
2. 
Read the voltage across the battery terminals again. If the voltage increase is 0.5 volts over the base voltage measured in Battery No-Load test
Step 3, the charging system is working properly. If your problem continues, there may be a
problem with the battery.
1. 
If the...

After disconnecting the battery and removing the drive belt, unplug the single wire connector ...
... then the multi-wire connector from the back of the alternator-integral regulator units lack the single wire
If the push-on connectors are difficult to remove, use a small pick to disengage the connector latch
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REMOVAL & INSTALLATION 221