Expanded electrical diagrams (VW Golf 2)

How to use the electrical circuit. It is necessary to find damage in the wiring or install an additional current consumer (you can't do without knowing the purpose of the current). Usually in the car's electrical equipment the body is used to connect the consumer to the negative terminal of the battery. This is a very convenient solution, since there remains both the wiring of the wire that feeds the consumer and the screwing of the consumer to the ground to close the circuit. Unfortunately, this is always impossible, since some consumers, due to design features, cannot be connected directly to the body. An example is the engine attached to the body on rubber pads or actually isolated from it. Therefore, the principle is accepted that a certain number of ground points are determined in the body. Wires to the ground of the nearest current consumers are conducted to these points. In Golf and Jetta cars, the ground wires are brown, and for the wires connected directly to the positive terminal of the battery, the color is red.

Each of the electrical circuits that feed the consumers has a fuse of the appropriate power. To feed consumers that consume high current, a relay is used. In this case, two circuits are distinguished: one is low current, controlling the switching on and off of the relay, and the second is high-voltage current, connected to the relay contacts, which are adapted to connect high-current. Usually, on one side, the current flows to the relay directly from the battery and through the high-voltage current contacts to a specific consumer.



An electrical diagram presents individual electrical circuits in an orderly fashion, making it possible to navigate the laying of electrical wires.

The horizontal lines at the top of each diagram represent the connections in the relay plate. The black dots at the intersections of the wires represent the non-disconnectable connections of those wires. The symbols for disconnectable connections have numbers written next to them, for example, 2/45, where:

2 - indicates the contact number on the relay plate;
45 - indicates the contact number (for example, relay), inserted into the plate.

All switches are shown in the diagrams in the "off" position. The vertical lines represent the wire bundles, and the lower horizontal lines symbolize the vehicle's ground, see Figure 4.18 and 4.19.

To facilitate the search, the composition of graphic symbols used in the diagrams (list) is indicated. To find a specific consumer, it is necessary to first select from the composition of the diagrams the one on which it can be located. If it is necessary to find a generator, the diagram with the name "Generator" is located first. On this diagram, the generator is found using graphic symbols, data in the figure or alpha-number designations, bottom in point 41 (figure 4.19). Near the graphic symbol, at the point where the wires are connected, there is a number that determines the clamp number on the consumer. The wire must be connected to the clamp of the consumer of this number. The same must be done with the numbers of the outputs from the relay box and the numbers near the ground. The numbers in the circles near the busbar ground are used to find the "ground point" on the body. The approximate position of the "ground point" can be determined based on the information given in paragraph 42.