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Circuit Diagrams
Circuit Diagrams
Circuit diagrams are created to provide a 'picture' of the electrical system and to identify
the route taken by each individual wire through the system, in order to identify which
components it feeds and which connectors the wire runs through. Circuit diagrams are
an essential tool for fault finding, as it is possible to locate start and finish points for a
circuit without having to manually trace the wire through the motorcycle itself. Circuit
diagrams may look confusing at first but when they are studied closely they soon
become logical.
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.
More information can be found in Circuit Diagrams, in the Electrical section of the
Service Manual.
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.
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