40
47
42
9
35
46 57
45
52 Connector Location - Volume 1
15 32
CONN 12
4
8
22 33
54
20 24
39 41
14
26 CONN 11
21
16
13
CONN 5 11
CONN 6 CONN 4
34
18 54
CONN 10 CONN 3 CONN 14 CONN 9 CONN 8 CONN 7
CONN 16 7
3
5
6
CONN 2 (User Defined Shutdown)
H-15
CONN 3
D-13
CONN 4
I-13
CONN 5
J-13
CONN 6
J-13
CONN 7
D-11
CONN 8
F-11
CONN 9
H-11
CONN 10
A-9
CONN 11
A-9
CONN 12 (Service Port Conn)
B-9
CONN 13
C-9
CONN 14
I-9
CONN 15
I-9
CONN 16
E-8
CONN 17
D-8
CONN 18
D-8
CONN 19
D-8
CONN 20
C-8
CONN 21
G-7
CONN 22
J-5
CONN 23
I-4
CONN 24
E-1
CONN 25
I-1
CONN 26
I-1
777E Off-Highway Truck Electrical System KYD1-UP KZD1-UP
The connectors shown in this chart are for harness to harness connectors. Connectors that join a harness to a component are generally located at or near the component. See the Component Location Chart.
CONN 13
CONN 1
12
CONN 21
29
CONN 1 (Connects To Seat Group)
Schematic Location J-16
Connector Number
28
27 CONN 15
CONN 18 CONN 19 CONN 17
CONN 2 CONN 20
Volume 1 of 5: Cab PUBLICATIONS.CAT.COM
CAB INTERIOR
CAB REAR COMPARTMENT Harness And Wire Electrical Schematic Symbols Symbols
59
58
T
49
44
Pressure Symbol
37 56
38
Schematic Location I-5
Machine Location 1
Alarm - Body Up
E-5
2
Alarm - Seat Belt
J-16
Breaker - Engine Control
E-8
Control - Brake
F-16
5
Switch - A/C On
D-4
35
Control - Chassis
J-16
6
Switch - A/C Thermostat
D-1
36
Control - Shifter/Hoist Lever
B-8
7
Switch - Adaptive Economy Mode
I-5
37
Converter - 10A
J-13
8
Switch - Auto Dipper
I-6
38
Display - Information
G-1
9
Switch - Auto Retarder
D-3
39
Display - OHT Cluster
G-5
10
Switch - Backlight Adjust
E-4
40
Flasher
H-15
11
Switch - Blower
F-2
41
Ground - Cab Strap
B-11
12
Switch - Column
C-5
42
Ground - Rear Cab 1
C-14
13
Switch - Door
J-6
43
Ground - Rear Cab 2
C-14
14
Switch - Egress Lamp (Cab)
G-6
44
Lever - Retarder
C-8
15
Switch - Fog Lamp
D-3
45
Module - Wiper Delay
H-15
16
Switch - Front Brake
D-3
46
Motor - A/C Blower
D-1
17
Switch - Hazard
E-3
47
Motor - Window
G-5
18
Switch - Head Lamp
E-3
48
Motor - Wiper
H-1
19
Switch - Heated Mirror
H-5
49
Panel - Fuse
I-8
20
Switch - Horn
B-4
50
Pass Through
E-8
21
Switch - Key
F-3
51
Port - 12V Power 1
G-3
22
Switch - Power Window
F-5
52
Component
31 43
Schematic Location F-5
Machine Location 31
Sensor - Secondary Brake Pedal
C-8
32
3
Sensor - Service Brake Position
C-9
33
4
Sensor - Throttle Position
C-5
34
Component Resistor - CAN
Port - 12V Power 2
C-9
23
Switch - Product Link
H-6
53
Port - 24V Power
D-11
24
Switch - Seat Belt
H-15
54 55
Radio - AM/FM
J-5
25
Switch - Secondary Steering Test
C-4
Relay - Main Power
E-8
26
Switch - TCS Test
H-5
56
Relay - Window Down
J-9
27
Switch - Throttle Lock/ Backup
E-4
57
Relay - Window Up
CONN 22 CONN 23
Flow Symbol
Circuit Breaker Symbol
Symbols and Definitions
53
19
Level Symbol
Component Location - Volume 1
Alarm - Action
CONN 24
Temperature Symbol
I-9
28
Switch - Work Light 1
H-5
58
Resistor
J-16
29
Switch - Work Light 2
G-5
59
Resistor - Blower Motor Drop
D-1
30
Fuse: A component in an electrical circuit that will open the circuit if too much current flows through it. Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component has screw terminals and a wire can be disconnected from it. Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). No circle indicates that the wire cannot be disconnected from the component. Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine. Ground (Case): This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine. Reed Switch: A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch. Sender: A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its resistance changes to give an indication to the gauge of the temperature or pressure.
T
Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay. Solenoid: A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work. Magnetic Latch Solenoid: A magnetic latch solenoid is an electrical component that is activated by electricity and held latched by a permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an internal switch that places the latch coil circuit open at the time the coil latches.
2
Harness and Wire Symbols Wire, Cable, or Harness Assembly Identification: Includes Harness Identification Letters and Harness Connector Serialization Codes (see sample).
Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)
L-C12 3E-5179
AG-C4 111-7898
L-C12 3E-5179
1
Part Number: for Connector Plug
Harness Connector Serialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness (C1, C2, C3, ...).
Part Number: for Connector Receptacle
2 5A
1
17
Plug
25
30
36
CONN 25
1 2
Deutsch connector: Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
1 2
Sure-Seal connector: Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.
Fuse (5 Amps)
9X-1123
Component Part Number
325-AG135 PK-14 Harness identification code: This example indicates wire group 325, wire 135 in harness "AG".
Wire Gauge* Wire Color
*Wire gauge is shown in AWG (American Wire Gauge) but could also be shown in metric denoted with mm
© 2021 Caterpillar. All Rights Reserved. CAT, CATERPILLAR, LET’S DO THE WORK, their respective logos, “Caterpillar Corporate Yellow”, the “Power Edge” and Cat “Modern Hex” trade dress as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.
CONN 26
CAB FRONT VIEW
Receptacle Pin or Socket Number
HEADLINER
(Dimensions: 56 inches x 35 inches)
23
10
48
UENR7793-01 VOL 1 of 5
50
UENR7793-01 May 2021
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