jcb 540-170, Service Manual

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Section 1-2 - General Information
Use
Electrical Device Codes
1-2-6 1-2-6
9803/3750-05 (1-01-00)
Electrical Device Codes
This manual uses a code system to help you identify the
electrical devices on the machine.
When the electrical system is designed at the factory
codes are given to the electrical connectors on the
electrical harnesses. The system allows the same code to
be used for different connectors.
For this reason a different system is used in this manual.
Each main category of devices is given a code type:
Each device is given one code and the code is used
throughout the manual. The same code is given to both the
device and its electrical connector.
Important: The electrical schematics and the harness
drawings in Section C are reproduced from the factory
drawings. For this reason they retain the factory connector
codes.
Code Type Category
-000 Earth points
+000 Power (from battery or alternator)
1000 Switches
2000 Relays
3000 Valves/Coils
4000 ECU’s
5000 Sensors
6000 Indicators/Lamps
7000 Other devices
8000 Harness Interconnections
9000 Fuses
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