Switches; Motors And Pumps - Aston Martin V8 Vantage Workshop Manual

In a correctly protected circuit, the fuse is placed 'Inline'
between the power source in this case the battery and the
lamp. If the lamp goes 'short circuit', a massive current will
begin to flow and the fuse will fail causing an open circuit.
The battery and wiring are protected from over current
damage.
Below is the fuse symbol as shown on the circuit diagrams.
The number above the fuse symbol is the fuse number;
allocated to this fuse. The number below the fuse symbol is
the rating.
Resistors
A resistor is an electronic component that by way of its
construction reduces the current flowing through it. A
resistors unit of measure is the Ohm.
The diagrams below show a resistor and a variable resistor.
Variable Resistors
A variable resistor works in the same manner as a normal
resistor but the resistance values can fluctuate. The
construction of a variable resistor depends upon its use and
environment.
One example is for the fuel tank level sensor. The tank full
level is 10 ohms and the tank empty level is 204 ohms, the
resistance will vary between 10 and 204 ohms depending on
how much fuel is in the tank.
October 2005
Wiring and Circuit Protection (18.01)
Electric Distribution/Electronic Control (18.00)
Lamps
Below is the symbol for a light bulb, shown below the
symbol is the power of the bulb in watts.

Switches

There are numerous of types of switch, several of examples
are shown below.
Normally Open Switch
2 Position Switch
3 Position Switch

Motors and Pumps

The same symbol is used for a pump or a motor, the
description differentiates between them.
Pump
Workshop Manual 18-1-9