Red wires go to pin 30, black wires go to pin 15 and brown wires go to pin 31. Now when you combine the colors with the pin designations, you will notice a pattern. As you become more familiar with DIN pin designations, you should be able to figure out the purpose without looking at a wiring schematic. While a terminal designation of 15 represents battery power when the ignition is in the crank or run position. For example, a terminal designation of 30 always represents a direct connection to the positive battery terminal. As you work with DIN standard wiring, certain numbers will be seen more often than others. These numbers are generally printed on the switch or other device for easy reference. First, take a look at the Bosch Terminal Designations. These European terminal designations are also known as DIN standard and are used to determine a terminals use. In addition to the color coding, a VW wiring schematic will have a number coding assigned to each terminal on a switch or other hardware component. The other colors will vary depending on the circuit but these three colors will cover most basic circuits. If you have spent any amount of time looking at a VW wiring schematic, you will notice that RED is used for constant power, meaning powered regardless of the ignition position, BLACK is switched power and BROWN is used for ground. From the addition of a simple accessory to a complete wiring harness overhaul, following some simple rules will make for a successful repair.įirst, we need to discuss a few basics regarding VW wiring. So with basic understanding of European wiring standards, many repair tasks can be tackled. Like most cars, with age, time and exposure, resistance can build up in a wiring harness and render simple circuits useless. The basic wiring of a VW Beetle is very similar to many other types of European cars. The vintage Volkswagen community thanks you! This article was contributed to by Jeremy Goodspeed of.
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