ELECTRICAL SCHEMATIC
Pressure
Symbol
T
Temperature
Symbol
Level
Symbol
Flow
Symbol
Circuit Breaker
Symbol
Harness and Wire Symbols
Symbols
Symbols and Definitions
Harness And Wire Electrical Schematic Symbols
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.
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.
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.
1
2
AG-C4
111-7898
L-C12
3E-5179
9X-1123
Component
Part Number
Pin or Socket Number
Part Number: for Connector Receptacle
Part Number: for Connector Plug
Harness Identification Letter(s):
(A, B, C, ..., AA, AB, AC, ...)
Plug
325-AG135 PK-14
Wire Color
Wire Gauge
Receptacle
1
1
2
2
Sure-Seal connector: Typical representation
of a Sure-Seal connector. The plug and receptacle
contain both pins and sockets.
Deutsch connector: Typical representation
of a Deutsch connector. The plug contains all
sockets and the receptacle contains all pins.
Fuse (5 Amps)
5A
Harness identification code:
This example indicates wire group 325,
wire 135 in harness "AG".
L-C12
3E-5179
Wire, Cable, or Harness
Assembly Identification: Includes
Harness Identification Letters and
Harness Connector Serialization
Codes (see sample).
Harness Connector Serialization Code:
The "C" stands for "Connector" and the
number indicates which connector in the
harness (C1, C2, C3, ...).
Volume 1of 2:
UENR4451-00
Sept 2014
1204F -E44TA and 1204F-E44TTA
Industrial Engines
Electrical System
MT
MU
©
2014 PERKINS
All Rights Reserved
Printed in U.S.A.
SOLENIOD FOR HIGH
PRESSURE FUEL PUMP
COOLANT TEMPERATURE
SENSOR
INTAKE PRESSURE FOR
NRS
ELECTRONIC CONTROL MODULE (ECM)
TEMPERATURE SENSOR FOR
NRS
INLET AIR TEMPERATURE
PRIMARY SPEED/TIMING
SENSOR
FUEL TEMPERATURE SENSOR
INLET MANIFOLD AIR
PRESSURE SENSOR
INLET MANIFOLD AIR
TEMPERATURE SENSOR
FUEL PRESSURE
SENSOR
ATMOSPHERE PRESSURE
SENSOR
PRIMING/FUEL TRANSFER PUMP
OIL PRESSURE SENSOR
WASTEGATE REGULATOR
CONTROL VALVE FOR
NRS
OUT PRESSURE SENSOR FOR
NRS
WATER IN FUEL
SWITCH
LOW OIL LEVEL SWITCH
SECONDARY SPEED/TIMING
SENSOR
ALTERNATOR
STARTER SOLENOID
STARTING MOTOR
STARTER RELAY
BACK PRESSURE
VALVE
ELECTRONIC CONTROL MODULE (ECM)
INTAKE PRESSURE FOR
NRS
WASTEGATE REGULATOR
CONTROL VALVE FOR
NRS
SOLENIOD FOR HIGH
PRESSURE FUEL PUMP
FUEL TEMPERATURE SENSOR
OIL PRESSURE SENSOR
STARTER SOLENOID
STARTING MOTOR
STARTER RELAY
ALTERNATOR
LOW OIL LEVEL SWITCH
ELECTRONIC CONTROL MODULE (ECM)
INLET MANIFOLD AIR
PRESSURE SENSOR
INLET MANIFOLD AIR
TEMPERATURE SENSOR
COOLANT TEMPERATURE
SENSOR
FUEL PRESSURE
SENSOR
TEMPERATURE SENSOR FOR
NRS
OUT PRESSURE SENSOR FOR
NRS
HARNESS SIDE CONNECTOR SIDE
1
1
8
1
8
80
8
80
80
73
73
73
DIESEL EXHAUST FLUID
INJECTOR
IDENTIFICATION MODULE
DOC TEMPERATURE
SENSOR
SCR TEMPERATURE
SENSOR
DIESEL EXHAUST FLUID
INJECTOR
SCR TEMPERATURE
SENSOR
DOC TEMPERATURE
SENSOR
DPF TEMPERATURE
SENSOR
SOOT SENSOR CONNECTION
NOx SENSOR LOCATION
AMMONIA SENSOR
AMMONIA SENSOR CONTROL
NOx SENSORS
HEATED LINE
DEF PUMP AND ELECTRONIC UNIT
DEF TANK LEVEL AND
TEMPERATURE SENSOR
COOLANT CONTROL VALVE
IDENTIFICATION MODULE
SOOT SENSOR CONNECTION
This document has been printed from SPI2. NOT FOR RESALE