Contents
Page Page
Cab Side Console Harness (W6) (S.N.
Group 05—System Information
815415-825657) Visually Inspect Electrical System . . . .9015-05-1
Wiring Diagram (1 of 2) . . . 9015-10A-23 Electrical
Wiring Diagram (2 of 2) . . . 9015-10A-24 Circuit Malfunctions . . . .9015-05-2
Cab Side Console Harness (W6) (S.N. Electrical
-825657) Circuit Malfunction Definations. . . .9015-05-3
Component Location (1 of 2) . . . 9015-10A-25
Electrical Circuit 9015
Component Location (2 of 2) . . . 9015-10A-26 Malfunction Locations . . . .9015-05-8
Cab Side Console Harness (W6) (S.N. Malfunction Troubleshooting . . . .9015-05-9
825658-872256) Using Test Equipment
Wiring Diagram (1 of 3) . . . 9015-10A-27 Multimeter . . . .9015-05-15
Wiring Diagram (2 of 3) . . . 9015-10A-28 Seven Step Electrical Test Procedure . . .9015-05-16
Wiring Diagram (3 of 3) . . . 9015-10A-29 Wiring Diagram, Schematic, And Component
Component Location (1 of 2) . . . 9015-10A-30 Location Information . . . .9015-05-18
Component Location (2 of 2) . . . 9015-10A-31 Reading a System FunctionalSchematic . .9015-05-20
Front Console Harness (W7) Reading A Wiring Diagram . . . .9015-05-21
Wiring Diagram . . . 9015-10A-32 Reading A Component Location
Component Location . . . 9015-10A-33 Diagram. . . .9015-05-22
Engine Harness (W8) Reading Connector End View Diagram . . . .9015-05-24
Wiring Diagram . . . 9015-10A-34 Electrical Schematic Symbols . . . .9015-05-26
Component Location . . . 9015-10A-35 Transmission Solenoid Harness (W9)
Group 10A—System Diagrams (S.N. —872256) Wiring Diagram . . . 9015-10A-36
Component Identification Table . . . 9015-10A-1 Component Location . . . 9015-10A-37
Fuse Blower Harness (W10)
Color Codes (Blade-Type) . . . 9015-10A-2 Wiring Diagram (S.N. -825657) . . . 9015-10A-38 Fuse Specifications . . . 9015-10A-3 Component Location (S.N. -825657) . . 9015-10A-39 Wiring and Schematic Diagrams Legend. . 9015-10A-4 Wiring Diagram (S.N.
825658-872256) . . . 9015-10A-40 System FunctionalSchematic Section
Component Location (S.N. Legend . . . 9015-10A-7
825658-872256) . . . 9015-10A-41 System FunctionalSchematic
Air Conditioning Compressor Harness (W11) (S.N. -825657) . . . 9015-10A-8
Wiring Diagram (S.N. -825657) . . . 9015-10A-42 System FunctionalSchematic (S.N.
Component Location (S.N. -825657) . . 9015-10A-43 825658-872256) Component Location (S.N. 1 of 5 . . . 9015-10A-14 825658-872256) . . . 9015-10A-44 2 of 5 . . . 9015-10A-15 Radio Harness (W12) 3 of 5 . . . 9015-10A-16
Wiring Diagram . . . 9015-10A-45 4 of 5 . . . 9015-10A-17
Component Location . . . 9015-10A-46 5 of 5 . . . 9015-10A-18
Auxiliary Valve Harness (W14) Cab Roof Harness (W5)
Wiring Diagram . . . 9015-10A-47 Wiring Diagram . . . 9015-10A-19
Component Location . . . 9015-10A-48 Component Location . . . 9015-10A-20
Cab Side Console Harness (W6) (S.N. Group 10B—System Diagrams (S.N. 872257— )
-815415) Component Identification Table . . . 9015-10B-1 Wiring Diagram (1 of 2) . . . 9015-10A-21
Continued on next page
Wiring Diagram (2 of 2) . . . 9015-10A-22
Contents
Page Page
Fuse Schematic (S.N. 825658—872256) . . . 9015-15A-10
Color Codes (Blade-Type) . . . 9015-10B-2 Sub-System Diagnostics . . . 9015-15A-11 Fuse Specifications . . . 9015-10B-3 Start Circuit Diagnostic Procedures . . . 9015-15A-11 Wiring and Schematic Diagrams Legend. . 9015-10B-4 Charge Circuit
System FunctionalSchematic Section OperationalInformation . . . 9015-15A-14 Legend . . . 9015-10B-7 Theory of Operation. . . 9015-15A-15 System FunctionalSchematic . . . 9015-10B-8 Schematic (S.N. —815415) . . . 9015-15A-16 Cab Roof Harness (W5) Schematic (S.N. 815416—825657) . . . 9015-15A-17 Wiring Diagram . . . 9015-10B-15 Schematic (S.N. 825658—872256) . . . 9015-15A-18 Component Location . . . 9015-10B-16 Sub-System Diagnostics . . . 9015-15A-19 Connectors, Wire and Pin Location . . . 9015-10B-17 Charging Circuit Diagnostic
Side Console Harness (W6) Procedures . . . 9015-15A-19 Wiring Diagram . . . 9015-10B-19 Display Module and Logic Module Circuit
Component Location . . . 9015-10B-22 With Logic Module
Connectors, Wire and Pin Location . . . 9015-10B-24 OperationalInformation (S.N.
Front Console Harness (W7) -815415). . . 9015-15A-21 Wiring Diagram . . . 9015-10B-28
9015
Theory of Operation (S.N. -815415). . . 9015-15A-22 Component Location . . . 9015-10B-29 Display Module and Logic Module Circuit
Connectors, Wire and Pin Location . . . 9015-10B-30 Without Logic Module
Engine Harness (W8) OperationalInformation (S.N. 815416—
Wiring Diagram . . . 9015-10B-32 825627) . . . 9015-15A-22 Component Location . . . 9015-10B-34 Theory of Operation (S.N. 815416—
Connectors, Wire and Pin Location . . . 9015-10B-35 825657) . . . 9015-15A-23 Blower Harness (W10) Theory of Operation (S.N. 825628—
Wiring Diagram . . . 9015-10B-38 872256) . . . 9015-15A-24 Component Location . . . 9015-10B-39 Display Module and Logic Module Circuit
Connectors, Wire and Pin Location . . . 9015-10B-40
Schematic (S.N. —815415) . . . 9015-15A-25 Air Conditioning Compressor Harness (W11)
Schematic (S.N. 815416—825657) . . . 9015-15A-26 Wiring Diagram . . . 9015-10B-41
Schematic (S.N. 825658—872256) . . . 9015-15A-27 Component Location . . . 9015-10B-42
Sub-System Diagnostics (S.N. — Connectors, Wire and Pin Location. . . 9015-10B-43
815415) . . . 9015-15A-28 Radio Harness (W12) Sub-System Diagnostics (S.N. Wiring Diagram . . . 9015-10B-44 815416—872256). . . 9015-15A-28 Component Location . . . 9015-10B-45
Display Module and Logic Module Circuit Connectors, Wire and Pin Location . . . 9015-10B-46
Diagnostic Procedures . . . 9015-15A-28 Selective Flow Valve Harness (W15)
Indicator Circuit Wiring Diagram . . . 9015-10B-47
Specifications. . . 9015-15A-29 Component Location . . . 9015-10B-48
OperationalInformation . . . 9015-15A-29 Connectors, Wire and Pin Location. . . 9015-10B-49
Theory of Operation (S.N. —815415) With
Logic Module . . . 9015-15A-30
Group 15A—Sub-System Diagnostics (S.N. —
Theory of Operation (S.N. 872256) 815416—825657) Without Logic Power Circuit Module . . . 9015-15A-31 OperationalInformation . . . 9015-15A-1 Theory of Operation (S.N. Theory of Operation. . . 9015-15A-1
825658—872256) Without Logic Schematic (S.N. -825657) . . . 9015-15A-2
Module . . . 9015-15A-32 Schematic (S.N. 825658-872256) . . . 9015-15A-3
Schematic With Logic Module (S.N. — Subsystem Diagnostics . . . 9015-15A-4
815415) . . . 9015-15A-33 Power Circuit Diagnostic Procedures . . . . 9015-15A-4
Schematic Without Logic Module (S.N. Start Circuit
OperationalInformation . . . 9015-15A-8 815416—825657). . . 9015-15A-34 Theory of Operation. . . 9015-15A-8
Schematic (S.N. -825657) . . . 9015-15A-9 Continued on next page
Contents
Page Page
Schematic Without Logic Module (S.N. Wiper/Washer Circuit
OperationalInformation . . . 9015-15A-63 825658—872256). . . 9015-15A-35
Theory of Operation. . . 9015-15A-63 Sub-System Diagnostics (S.N. —
Schematic . . . 9015-15A-64 872256) . . . 9015-15A-36
Sub-System Diagnostics . . . 9015-15A-65 Indicator Circuit Diagnostic Procedures . . 9015-15A-36
Wiper/Washer Circuit Diagnostic MFWD Circuit Procedures . . . 9015-15A-65 Specifications ( . . . 9015-15A-39 Blower Circuit OperationalInformation . . . 9015-15A-40 OperationalInformation . . . 9015-15A-68 Theory of Operation. . . 9015-15A-40
Theory of Operation (S.N. — Schematic . . . 9015-15A-41
816286) . . . 9015-15A-68 Sub-System Diagnostics . . . 9015-15A-42
Schematic (S.N. —816286) . . . 9015-15A-69 MFWD Circuit Diagnostic Procedures . . . 9015-15A-42
Theory of Operation (S.N. 816287— DifferentialLock Circuit
872256) . . . 9015-15A-70 9015
OperationalInformation . . . 9015-15A-43
Schematic (S.N. 816287—872256) . . . 9015-15A-71 Theory of Operation. . . 9015-15A-43
Sub-System Diagnostics (S.N. — Schematic . . . 9015-15A-44
872256) . . . 9015-15A-72 Sub-System Diagnostics . . . 9015-15A-45
Blower Circuit Diagnostic Procedures . . . 9015-15A-72 DifferentialLock Diagnostic
Drive and Work Light Circuit Procedures . . . 9015-15A-45
OperationalInformation . . . 9015-15A-74 Start Aid Circuit
Theory of Operation. . . 9015-15A-74 OperationalInformation . . . 9015-15A-45
Schematic . . . 9015-15A-75 Theory of Operation. . . 9015-15A-46
Sub-System Diagnostics . . . 9015-15A-76 Schematic . . . 9015-15A-47
Drive and Work Light Circuit Diagnostic Sub-System Diagnostics . . . 9015-15A-48
Procedures . . . 9015-15A-76 Start Aid Circuit Diagnostic Procedures. . 9015-15A-48
Park Brake/NeutralDisconnect Circuit FuelShut-Off Circuit
Specifications. . . 9015-15A-77 OperationalInformation . . . 9015-15A-48
OperationalInformation . . . 9015-15A-77 Theory of Operation. . . 9015-15A-49
Theory of Operation. . . 9015-15A-78 Schematic . . . 9015-15A-50
Schematic (S.N. —815415) . . . 9015-15A-79 Sub-System Diagnostics . . . 9015-15A-51
Schematic (S.N. 815416—825657) . . . 9015-15A-80 FuelShut-Off Circuit Diagnostic
Schematic (S.N. 825658—872256) . . . 9015-15A-81 Procedures . . . 9015-15A-51
Sub-System Diagnostics (S.N. — Reverse Alarm Circuit
872256) . . . 9015-15A-82 OperationalInformation . . . 9015-15A-52
Park Brake/NeutralDisconnect Circuit Theory of Operation. . . 9015-15A-52
Diagnostic Procedures . . . 9015-15A-82 Schematic . . . 9015-15A-53 FNR/Range ControlCircuit
Sub-System Diagnostics . . . 9015-15A-54 OperationalInformation . . . 9015-15A-86 Reverse Alarm Circuit Diagnostic Theory of Operation. . . 9015-15A-87 Procedures . . . 9015-15A-54 Schematic . . . 9015-15A-89 Dome Light Circuit Sub-System Diagnostics . . . 9015-15A-90
OperationalInformation . . . 9015-15A-57 FNR/Range ControlCircuit Diagnostic
Theory of Operation . . . 9015-15A-57 Procedures . . . 9015-15A-90 Schematic . . . 9015-15A-58 Horn Circuit
Sub-System Diagnostics . . . 9015-15A-59 OperationalInformation . . . 9015-15A-98 Dome Light Circuit Diagnostic Theory of Operation. . . 9015-15A-98 Procedures . . . 9015-15A-59 Schematic . . . 9015-15A-99 Radio Circuit Sub-System Diagnostics . . . .9015-15A-100 OperationalInformation . . . 9015-15A-60 Horn Circuit Diagnostic Procedures. . . . .9015-15A-100 Theory of Operation. . . 9015-15A-60 Turn Signal, Flasher and Brake Light Circuit
Schematic . . . 9015-15A-61 OperationalInformation . . . .9015-15A-100 Sub-System Diagnostics . . . 9015-15A-62
Continued on next page
Radio Circuit Diagnostic Procedures . . . . 9015-15A-62
Contents
Page Page
Theory of Operation. . . .9015-15A-101 Charging Circuit Diagnostic
Procedures . . . 9015-15B-13 Schematic . . . .9015-15A-103
Sub-System Diagnostics . . . .9015-15A-104 DifferentialLock Circuit
OperationalInformation . . . 9015-15B-15 Turn Signal, Flasher and Brake Light Circuit
Diagnostic Procedures . . . .9015-15A-104 Theory of Operation. . . 9015-15B-16 Schematic . . . 9015-15B-17 Beacon Circuit
OperationalInformation . . . .9015-15A-106 Sub-System Diagnostics . . . 9015-15B-18 DifferentialLock Circuit Diagnostic
Theory of Operation. . . .9015-15A-107
Schematic . . . .9015-15A-108 Procedures . . . 9015-15B-18 MFWD Circuit
Sub-System Diagnostics . . . .9015-15A-109
Beacon Circuit Diagnostic Procedures. . .9015-15A-109 OperationalInformation . . . 9015-15B-19 Theory of Operation. . . 9015-15B-19 Return-to-Dig Circuit
OperationalInformation . . . .9015-15A-109 Schematic . . . 9015-15B-20 Sub-System Diagnostics . . . 9015-15B-20 Theory of Operation. . . .9015-15A-110
Schematic . . . .9015-15A-111 MFWD Circuit Diagnostic Procedures . . . 9015-15B-20 Radio Circuit
Sub-System Diagnostics . . . .9015-15A-112
Return-to-Dig Circuit Diagnostic OperationalInformation . . . 9015-15B-22
9015
Procedures . . . .9015-15A-112 Theory of Operation. . . 9015-15B-22 Schematic . . . 9015-15B-23 FuelGauge and Hour Meter Circuit
Specifications . . . .9015-15A-113 Sub-System Diagnostics . . . 9015-15B-24 Radio Circuit Diagnostic Procedures . . . . 9015-15B-24 OperationalInformation . . . .9015-15A-113
Theory of Operation. . . .9015-15A-114 Dome Light Circuit
OperationalInformation . . . 9015-15B-25 Schematic . . . .9015-15A-115
Sub-System Diagnostics . . . .9015-15A-116 Theory of Operation . . . 9015-15B-25 Schematic . . . 9015-15B-26 FuelGauge and Hour Meter Circuit
Diagnostic Procedures . . . .9015-15A-116 Sub-System Diagnostics . . . 9015-15B-27 Dome Light Circuit Diagnostic
Auxiliary Valve Circuit
OperationalInformation . . . .9015-15A-118 Procedures . . . 9015-15B-27 Start Aid Circuit
Theory of Operation. . . .9015-15A-118
Schematic . . . .9015-15A-119 OperationalInformation . . . 9015-15B-27 Theory of Operation. . . 9015-15B-28 Sub-System Diagnostics . . . .9015-15A-120
Auxiliary Valve Circuit Diagnostic Schematic . . . 9015-15B-29 Sub-System Diagnostics . . . 9015-15B-30 Procedures . . . .9015-15A-120
Start Aid Circuit Diagnostic Procedures. . 9015-15B-30 FuelShut-Off Circuit
Group 15B—Sub-System Diagnostics (S.N.
872257— ) OperationalInformation . . . 9015-15B-30 Theory of Operation. . . 9015-15B-31 Power Circuit OperationalInformation . . . 9015-15B-1 Schematic . . . 9015-15B-32 Sub-System Diagnostics . . . 9015-15B-33 Theory of Opertion. . . 9015-15B-1
Schematic . . . 9015-15B-2 FuelShut-Off Circuit Diagnostic
Procedures . . . 9015-15B-33 Sub-System Diagnostics . . . 9015-15B-3
Power Circuit Diagnostic Procedures . . . . 9015-15B-3 Reverse Alarm Circuit
OperationalInformation . . . 9015-15B-33 Start Circuit
OperationalInformation . . . 9015-15B-5 Theory of Operation. . . 9015-15B-34 Schematic . . . 9015-15B-35 Theory of Operation. . . 9015-15B-6
Schematic . . . 9015-15B-7 Sub-System Diagnostics . . . 9015-15B-36 Reverse Alarm Circuit Diagnostic
Sub-System Diagnostics . . . 9015-15B-8
Start Circuit Diagnostic Procedures . . . 9015-15B-8 Procedures . . . 9015-15B-36 Air Adjust Seat Circuit
Charging Circuit
OperationalInformation . . . 9015-15B-10 OperationalInformation . . . 9015-15B-39 Theory of Operation. . . 9015-15B-39 Theory of Operation. . . 9015-15B-11
Schematic . . . 9015-15B-12
Continued on next page
Sub-System Diagnostics . . . 9015-15B-13
Contents
Page Page
Schematic . . . 9015-15B-40 Turn Signal, Flasher, and Brake Light Circuit
Specifications . . . 9015-15B-77 Sub-System Diagnostics . . . 9015-15B-41
OperationalInformation . . . 9015-15B-78 Air Adjust Seat Circuit Diagnostic
Theory Of Operation . . . 9015-15B-78 Procedures . . . 9015-15B-41 Schematic . . . 9015-15B-79 Blower Circuit Sub-System Diagnostics . . . 9015-15B-80 OperationalInformation . . . 9015-15B-42
Turn Signal, Flasher, and Brake Light Circuit Theory of Operation. . . 9015-15B-42 Diagnostic Procedures . . . 9015-15B-80 Schematic . . . 9015-15B-43 Beacon Circuit Sub-System Diagnostics . . . 9015-15B-44 OperationalInformation . . . 9015-15B-84 Blower Circuit Diagnostic Procedures . . . 9015-15B-44
Theory of Operation. . . 9015-15B-84 Air Conditioning Circuit
Schematic . . . 9015-15B-85 Specifications. . . 9015-15B-45
Sub-System Diagnostics . . . 9015-15B-86 OperationalInformation . . . 9015-15B-45
Beacon Circuit Diagnostic Procedures. . . 9015-15B-86 9015
Theory of Operation. . . 9015-15B-46 Return-to-Dig Circuit Schematic . . . 9015-15B-47 OperationalInformation . . . 9015-15B-87 Sub-System Diagnostics . . . 9015-15B-48 Theory of Operation. . . 9015-15B-87 Blower/Air Conditioning Circuit Checks . . 9015-15B-48
Schematic . . . 9015-15B-88 Wiper/Washer Circuit
Sub-System Diagnostics . . . 9015-15B-89 OperationalInformation . . . 9015-15B-51
Return-to-Dig Circuit Diagnostic Theory of Operation. . . 9015-15B-51
Procedures . . . 9015-15B-89 Schematic . . . 9015-15B-52
FuelGauge and Hour Meter Circuit Sub-System Diagnostics . . . 9015-15B-53
Specifications . . . 9015-15B-91 Wiper/Washer Circuit Diagnostic
OperationalInformation . . . 9015-15B-91 Procedures . . . 9015-15B-53
Theory of Operation. . . 9015-15B-92 Rear Work Light Circuit
Schematic . . . 9015-15B-93 OperationalInformation . . . 9015-15B-56
Sub-System Diagnostics . . . 9015-15B-94 Theory Of Operation . . . 9015-15B-57
FuelGauge and Hour Meter Circuit Schematic . . . 9015-15B-58
Diagnostic Procedures . . . 9015-15B-94 Sub-System Diagnostics . . . 9015-15B-59
Display Monitor Circuit Rear Work Light Circuit Diagnostic
OperationalInformation . . . .9015-15B-100 Procedures . . . 9015-15B-59
Theory Of Operation . . . .9015-15B-101 Front Work and Drive Light Circuit
Schematic . . . .9015-15B-103 OperationalInformation . . . 9015-15B-60
Sub-System Diagnostics . . . .9015-15B-104 Theory Of Operation . . . 9015-15B-60
Display Monitor Diagnostic Schematic . . . 9015-15B-61
Procedures . . . .9015-15B-104 Sub-System Diagnostics . . . 9015-15B-62 Indicator Circuit
Front Work and Drive Light Circuit Diagnostic Specifications. . . .9015-15B-106 Procedures . . . 9015-15B-62 OperationalInformation . . . .9015-15B-107 Park Brake/FNR Circuit Theory of Operation. . . .9015-15B-108 OperationalInformation . . . 9015-15B-63 Schematic . . . .9015-15B-109 Specifications. . . 9015-15B-63 Sub-System Diagnostics . . . .9015-15B-110 Theory Of Operation . . . 9015-15B-64 Indicator Circuit Diagnostic
Schematic (Power Shift) . . . 9015-15B-66 Procedures . . . .9015-15B-110 Sub-System Diagnostics . . . 9015-15B-67 Selective Flow Valve Circuit
Park Brake/NeutralDisconnect Circuit OperationalInformation . . . .9015-15B-113 Diagnostic Procedures . . . 9015-15B-67 Theory of Operation. . . .9015-15B-114 Horn Circuit Schematic . . . .9015-15B-115 OperationalInformation . . . 9015-15B-75 Sub-System Diagnostics . . . .9015-15B-116 Theory of Operation. . . 9015-15B-75 Selective Flow Valve Diagnostic
Schematic . . . 9015-15B-76 Procedures . . . .9015-15B-116 Sub-System Diagnostics . . . 9015-15B-77
Continued on next page
Horn Circuit Diagnostic Procedures. . . 9015-15B-77
Contents
Page
Group 20—References
Alternators and Starting Motors—Use
CTM77. . . .9015-20-1 JT05801 Clamp-On Electronic Tachometer
Installation . . . .9015-20-1 Battery Operation . . . .9015-20-2 Battery Specifications . . . .9015-20-3 Diagnose Battery Malfunctions . . . .9015-20-4 Check Battery Electrolyte Level and
Terminals. . . .9015-20-5 Procedure for Testing Batteries . . . .9015-20-7 Using Booster Batteries—12 Volt System . . .9015-20-8 Alternator Operation
78 Amp DELCO REMY (SerialNo. —
787513) . . . .9015-20-10 95 Amp BOSCH (SerialNo. 787514—
) . . . .9015-20-12
9015
95 Amp BOSCH . . . .9015-20-13 Monitor Test in Machine . . . .9015-20-14 Logic Module Test in Machine (S.N. —
815415) . . . .9015-20-15 Logic Module Bench Test (S.N. —
815415) . . . .9015-20-17 Tachometer Calibration
(S.N. —872256). . . .9015-20-18 (S.N. 872257— ) . . . .9015-20-19