How To Read The Circuits - Aston Martin V8 Vantage Workshop Manual

Wiring and Circuit Protection (18.01)
Electric Distribution/Electronic Control (18.00)
Boot Fusebox
Fuse/ Rating Function
Relay
F1 5A Spare
F2 20A Spare
F3 30A Heated rear window
F4 20A Spare
F5 30A Spare
F6 20A Spare
F7 5A Battery disconnect switch (BDS) power
F8 20A Spare
F9 20A Tracker
F10 30A Spare
F11 20A Spare
F12 20A Spare
F13 10A Spare
F14 5A Rear parking assistance module (optional)
F15 5A Spare
F16 30A Spare
F17 5A Spare
F18 30A Audio amplifier
F19 5A Spare
F20 10A Canister vent
F21 30A Spare
F22 20A Exhaust by-pass and vacuum pump
18-1-4

How to Read the Circuits

Below is a simple guide to what symbols mean on the circuit
diagrams. For some of the symbols there are descriptions as
to how they function.
Wires
Wire numbers have been deleted from the original
engineering circuits. This allows the type size to be
increased for improved legibility of the service circuits.
Wires vary in size to allow different current to be carried. For
example a wire with a diameter of 0.50mm (This is the
diameter of all the internal copper strands together) will
carry 11A (dependant on ambient temperature) whilst a wire
with a diameter of 2.00mm will carry 25A.
Wire No.
Colour
Size
Twisted Wires
The 'figure of 8' shown on circuits as below denotes a
twisted wire and shows the wires that are twisted together.
A wire generates a certain amount of 'electrical noise' when
a current is passed through it. By twisting the 2 wires
together the 'electrical noise' is cancelled out on each wire
by the opposing wire. This is used more on sensors and
audio speakers.
Wire No.
Colour
MAP (Defines twisted pair)
Size
Screened and Twisted Screen Wires
The signals through a wire can be affected by externally
generated electrical noise. To reduce the external
interference the wires are placed inside a conductive sleeve.
One end of the conductive sleeve is always open whilst the
other end can be terminated to a ground, to a component,
or left open.
Workshop Manual
173 WR 2.0
908 GU MAPM 05
October 2005