Mack Trucks Truck Electric Electrical Troubleshooting Manual
FILE DETAILS:
Mack Trucks Truck Electric Electrical Troubleshooting Manual
LANGUAGE:ENGLISH
PAGES:124
DOWNLOADABLE:YES
FILE TYPE:PDF
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DESCRIPTION:
Mack Trucks Truck Electric Electrical Troubleshooting Manual
Electricity provides the power necessary for starting the engine and operating the various lights and other auxiliary systems installed on the chassis. Diagnosing problems that can occur in a truck electrical system involves a basic understanding of electrical concepts, and testing and measurement procedures. The purpose of this manual is to familiarize the technician with basic electrical concepts and diagnostic procedures. It is not intended to be vehicle specific.
TABLE OF CONTENTS:
Mack Trucks Truck Electric Electrical Troubleshooting Manual
SAFETY INFORMATION iii
ADVISORY LABELS iv
SERVICE PROCEDURES AND TOOL USAGE v
DESCRIPTION AND OPERATION 1
INTRODUCTION 2
ELECTRICAL CONCEPTS 2
Understanding Electricity 2
VOLTAGE 4
Sources of Voltage 5
CURRENT 7
Actual 7
Conventional 7
Types of Current 8
RESISTANCE 10
Resistance, Heat and Current Flow 10
CIRCUIT TYPES 11
Series Circuits 11
Parallel Circuits 11
Series-Parallel Circuits 12
OHM’S LAW 13
EXPRESSING ELECTRICAL VALUES 15
DIAGNOSTIC TOOLS 16
Jumper Wire 16
Multimeter (Volt-Ohm Meter) 16
Multimeter (Volt-Ohm Meter) Usage 17
TROUBLESHOOTING METHOD 22
Diagnostic Techniques 22
Diagnostic Applications 22
Locating Shorts or Grounded Circuits 25
Circuit Continuity Checks 26
Checking Circuit Grounds 28
POWER DISTRIBUTION 30
Battery-Powered Circuits 30
Key-Powered Circuits 31
Ground Circuits 32
TYPICAL ELECTRIC EQUIPMENT PANEL 33
CIRCUIT BREAKERS 34
SAE Type 1 34
SAE Type 2 34
SAE Type 3 35
Testing Circuit Breakers 35
WIRE SIZES 36
WIRE IDENTIFICATION 37
BATTERIES — GENERAL INFORMATION 39
Description 39
Operation 40
Types of Batteries 41
Periodic Maintenance 41
Battery Tests 42
Front fm Page viii Tuesday, June 29, 1999 3:11 PM
TABLE OF CONTENTS
ix
STARTING SYSTEM 45
Operation 45
Troubleshooting 46
CHARGING SYSTEM 52
Operation 52
Charging System Tests 53
MISCELLANEOUS CIRCUITS — DESCRIPTION/FUNCTION 55
Lighting 55
Gauges 56
Sending Units 58
TROUBLESHOOTING 61
TROUBLESHOOTING OF INSTRUMENT CLUSTER, GAUGES, SENDING UNITS,
SENSORS AND HORN 62
Gauge Testing 62
Specific Gauge and Sending Unit Tests 64
Speed Sensors 72
Horn 74
REPAIR PROCEDURES 79
COMMON ELECTRICAL PROCEDURES 80
Correct Use of Tie Wraps 80
Typical Connectors 83
Chassis Electrical Sealant Application 101
SPECIAL TOOLS & EQUIPMENT 103
RECOMMENDED ELECTRICAL TOOLS 104
INDEX 105
PLEASE NOTE:
⦁ This is the same manual used by the dealers to diagnose and troubleshoot your vehicle
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