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Electrical schematic symbols

Internal connections (thin lines) - such compounds are not a wire, but it is for the electrical current. They make it possible to trace the path of current flow within the apparatus.

Clip 15 - when the ignition is on it has the battery voltage.

Position relay number indicates the number of relays in the relay and fuse.

Marking element allows to find the list of name of the element represented by the graphical symbol in this case, the fuel injection control unit.

Wire color matches the color of the wires in the car, in this case - brown.

The numbers in circles indicate the installation location or the location of the connection with "weight".

Number of current track facilitates the search for elements in the diagram.

Alphanumeric identification marks releasable connection. In this case T8a / 7. T8 represents a 8-pin connection A7 - 7th pin.

The numbers in the squares represent the interrupt circuit and the current track number is set to continue the chain.

Graphic symbol, in this case the fuse.

Alphanumeric characters in the joints determines the position of the wires in the connectors. For example, indicates a contact M30az 30az connector M.

Designation of contacts on relays, control units and on-board or additional panel of the relay, for example: 38/30 - on the panel.

Letter designations electrical circuit elements

Designation	Element
A	Battery
B	Starter
C	Generator
D	Egnition lock
E	A switch activated manually
F	Mechanical Switch
G	Sensor, control unit
H	Sound signal
J	The relay control unit
K, L, M, W, X	Control lamp, lighting fixture
N	Solenoid resistor, connector
O	Distributor
P, Q	The tip of the spark plugs, spark plug
R	Radio
S	Fuse
T	Plug connection
V	The electric motor