The six-volt electrical system was standard on all Volkswagens through the 1966 models. Beginning with the 1967 models-August 1966-the change was made to the 12-volt system.
The Volkswagen electrical system is fairly conventional, consisting of generator, starter, battery, ignition and lighting systems and electrical accessories. Most of the electrical equipment is supplied by Bosch, although VW also produces some of its own components. The output of the generator is, as in most systems, controlled by a voltage regulator. In case of belt failure or other generator problems, a warning light in the speedometer dial lights.
The starter motor produces about 1 / 2 horsepower and is of the overrunning-clutch type. It is actuated by the ignition key and incorporates a solenoid, which engages the pinion of the starter.
The electrical system of the Volkswagen is of the negative-ground type, the negative terminal of the battery being grounded. In most VW models, the battery is located under the right-hand side of the rear seat. In the Karmann Ghia and Transporter models it is in the engine compartment.