Circuit Diagrams; Basic Electrical Circuits; Basic Circuit Diagram - Triumph Scrambler 1200 XC Service Manual

To use either of the following triangles, put your finger over the value you want to find.
Multiply the remaining values if side by side, or divide if one is over the other.

Basic Electrical Circuits

Basic Circuit Diagram

In the above circuit an electrical reservoir (the battery) is connected via a cable to a
terminal on the controlling device (the switch) whose contacts are either open or
closed. The other terminal on the switch is connected via a cable to the consumer
(the bulb), and the other side of the bulb filament is connected to ground (earth) by
another cable. The ground point is usually a part of the frame or engine, to which the
battery negative terminal is also connected.
When the switch contacts are open (as shown in the diagram), the circuit is broken
and no current flows. When the switch contacts are closed, the circuit is made and
current flows from the battery positive terminal through the switch contacts and bulb
filament to ground. The frame completes the circuit to the battery negative terminal
and the bulb illuminates.
Although some circuits on the circuit diagram may at first seem more complicated, it
will generally be found that they can be broken down into sections which do not differ
greatly from the basic circuit above.

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. Circuits diagrams may look confusing at first but when they are
studied closely they soon become logical.
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