Chrysler RAM TRUCK 2500 1994 Service Manual page 316

• ELECTRICAL 8A - 1
E L E C T R I C A L
G R O U P INDEX
group group
AUDIO SYSTEMS
8F POWER MIRRORS
8T
BATTERY/STARTER/GENERATOR SERVICE . . . 8B POWER SEAT , . . . 8R
BATTERY/STARTING/CHARGING SYSTEMS POWER WINDOWS . . . , 8S
DIAGNOSTICS 8A RESTRAINT SYSTEMS 8M
HORNS
. . . 8G TURN SIGNALS AND HAZARD WARNING
IGNITION SYSTEMS 8D FLASHERS 8J
INSTRUMENT PANEL AND GAUGES
8E VEHICLE SPEED CONTROL SYSTEM ,, 8H
LAMPS
8L WARNING BUZZER SYSTEM
8U
OVERHEAD CONSOLE 8C WINDSHIELD WIPERS AND WASHERS 8K
POWER LOCKS
. . . 8P WIRING DIAGRAMS
. . . 8W
BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS
C O N T E N T S
page page
BATTERY TEST PROCEDURES 3 GENERATOR TEST PROCEDURES 15
ENGINE STARTER MOTOR TEST PROCEDURES . 1 0 SPECIFICATIONS " 20
GENERAL INFORMATION 1 USING ON-BOARD DIAGNOSTIC SYSTEM . . . . 19
GENERAL INFORMATION
The battery, starting, and charging systems operate
with one another and, therefore, must be thoroughly
tested as a complete system. I n order for the vehicle
to start and charge properly, i t must have a battery
that will perform to specifications. The starter motor,
generator, wiring, and electronics also must perform
within specifications.
Group 8A covers starting (Fig. 1) and charging
(Fig. 2) system diagnostic procedures. These proce­
dures include the most basic conventional methods,
to on-board diagnostics (OBD) built into the power-
train control module (PCM). Use of an ammeter, volt/
ohmmeter, battery charger, carbon pile rheostat (load
tester), and 12-volt test lamp will be required.
All OBD sensing systems are monitored by the
PCM. The PCM will store a diagnostic trouble code
(DTC) i n memory for any detectable failure i n the
monitored circuits. Refer to Using On-Board Diagnos­
tic System i n this group for more information.