Tracing Circuits; Open Circuit; Short Circuit - Triumph Scrambler 1200 XC Service Manual

Due to the complex circuits and the number of individual wires, Triumph uses two
types of circuit diagram in its Service Manuals.
Within the manual, conventional circuit diagrams are used to show the layout of
the main circuits of the motorcycle. These are: Engine management/ignition,
Lighting, Starting and Charging and Auxiliary and Accessory. In these diagrams
no attempt is made to show the components of the system in any particular order
or position in relation to the motorcycle.
At the back of the Service Manual a full colour layout circuit diagram is used to
show the main electrical components in a position similar to the actual position
on the motorcycle.
Both of these circuit diagrams use similar symbols to illustrate the various system
components and will be accompanied by a key indicating circuit diagram
components and wiring colour codes.
Circuit diagrams also depict the inner workings of a switch housing (i.e. which wire
connects to which when a switch is turned from one position to another) so that a test
of that switch can be made using the wire terminals in the connector instead of
disassembling the switch itself.

Tracing Circuits

The following is a description of two types of common electrical failures, and some of
the methods which may be used to find them.

Open Circuit

A break in an electrical circuit - current cannot flow. Usually caused by a break in a
wire or cable or by a loose connection. Open circuits can often be intermittent, making
diagnosis difficult.

Short Circuit

A 'short cut' in an electrical circuit - current bypasses the intended circuit, either to
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