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Electrical circuits

If you want to find a fault in the electrical system, or install additional power consumers, then do it without the help of electronic circuits is difficult. Schematic diagrams show the current flow, i.e. connection circuits between them.

Since the "weight" of the car is his body, the negative battery cable is connected to the body. The majority of electricity consumers are connected to "weight" wire brown. In some circuits can be placed switches, relays, fuses, measuring instruments, motors and other electrical appliances and components. To ensure that these elements are connected properly, contacts marked accordingly.

To facilitate the search should be carried out in the circuit diagram specific current path placed beside each other vertically and numbered.

Vertical lines usually extend to the shaded field. This field represents the block of the relay and fuse, and hence the positive pole connecting electrical circuits. The board relay is also an internal connection with "weight" (terminal "31"). Thin lines in this field indicates exactly what the chain and how to switch from using the corresponding relay. Below current track comes to a horizontal line which denotes the connection to a "weight". The connection with "weight" is usually made directly by the body, but can also be formed by a wire from a point on the body.

If the wire is interrupted by squares with numbers, it represents the electric current path, on which the circuit continues in other schemes.

When using electrical circuit is recommended to first in the list (next to or under the scheme) to find the desired item (eg, the fan switch). To the left of the name of the element specified number of the current track him, which is repeated in the diagram below and a horizontal line.

To facilitate the reading of electronic circuits need to learn letters and graphical notation elements.

To accurately identify the element to its letter marking the numbers are added.

Inside designate depicted interconnections. They show how the relays and other elements interconnected.

The number in a black square represents the point of the relay on the power switch and fuses.

For example, if the scheme is given the designation "17/87", that "17" indicates the number of contacts on the relay board, and "87" - the number of relay contact or the control unit.

Designation of the contacts correspond to the norms 01M.

On the terminal "15" powered through the ignition switch. For these circuits the electrical current flows only when the ignition is switched on.

Via terminal ?�X?� as the current passes only with the ignition on, but it ceases to flow at the time of the starter. This enables the use of the entire capacity of the battery when starting the engine. In this circuit, all the main consumers of electricity. Threads beam headlight bulb is also fed from this terminal. Thus, when the driving beam and the ignition off, it automatically switches on parking lights.

Terminal "30" is constantly under voltage from the battery.

Terminal "31" is connected to "weight". Wires "masses" are usually brown. In electrical circuits near the individual wires are numbers, such as 1.5. The figure represents a cross-section of the wire in mm ^2. As the case that the wires of the same colors are used in different circuits, it is advisable to check the combination of the wires in the respective point of connection.

The wires that are interconnected via one or multicontact connectors are besides lettering releasable connection ("T"), the additional symbol.

Example: "T2P" means two-pin connector, "T32 / 27" - 27 minutes contact 32-pin connector.

All consumers of electricity and switches are shown in the electrical circuits in the off position.