Structure of electrical circuits (VW Golf 1)

To work with auto electrical equipment, it is much more important to know the electrical diagrams than the location of individual structural parts. Therefore, the so-called connection diagrams are popular in the Volkswagen company, from which one can understand without much trouble the functional interrelation of various parts of the auto electrical equipment.

The wiring diagram is a current circuit with the shortest cable line (electric current line). The connection diagram is drawn regardless of the installation location in the vehicle. Multifunctional structural parts can be distributed over several lines.

Central part of electrical equipment

As previously stated, the central part of the electrical equipment includes: a fuse box, plug panels for multiple relays (designation "J") and connections for multi-pin plugs. The plugs are designated in alphabetical order (see picture). The combined alphanumeric designations on the bottom panel of neutral electrical equipment provide information about the wire loading on the plugs. For example, C5 is contact 5 in the multi-pin plug C.

Distribution of electric current

At the very top of the central part of the electrical equipment there is the so-called plus side. From here the electric current coming from the battery or from the generator is distributed. At the bottom the wires branch out to various consumers of current.

Fuses

Fuses placed in the holder are designated by the letter "S" and a number. The numbering corresponds to their location in the holder. In addition, the permissible electrical load is indicated: for example, the rated current is 10 A.

Wires

As for electric wires, the cross-section of their metal core is indicated. For example, "0.5" means 0.5 sq. mm. In addition, there is an abbreviated designation for colored cables. The designations are deciphered as follows: bl - blue; br - brown; ge - yellow; gn - green: gr - gray; li - purple; ro (or rt) - red; sw - black; ws - white.

Plug connections

Plug connections are designated "T", with the exception of the multi-pin plug in the central part of the electrical equipment. The letter designation is followed by a digital one. It can be used to understand which plug is being discussed. For example, T3 is a triple plug. Using the explanation of the electrical diagram, you can find out where this plug is located in the car.

Structural parts

All electrical structural parts in the wiring diagram have letter designations, if necessary also with numbers. The designations are unified for all Volkswagen and Audi models. For example, A - battery; E - manual switch; L and M - incandescent lamps; V - engine.

Switch symbols

Standard symbols are used to depict structural parts, with all switches and contacts shown in the neutral position.

Terminal Designations

Two digits (if necessary with letters on the electrical diagram) identically can be found on the corresponding structural part.

Electric current lines

At the bottom of the bottom panel are numbered electrical connection diagrams. Each structural part has at least one of its own electrical current lines. If a current line ends in a square, then there is a number in it indicating where the current line continues.

Internal connections are not wires, but metal buses or bridges. They are shown in the wiring diagram as thin transverse lines.

"Weight"

The body, engine or gearbox serve for the return flow of electric current in the car's electrical equipment. This is the so-called "ground". In the connection diagram, the "ground" is shown at the bottom as a thin transverse line. If the electrical structural part cannot be connected directly to the "ground", then the connection is made through the so-called mass point, which is indicated in the diagram by a number in a circle at the bottom, on the ground line.

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