This demonstration board which will give a complete idea of the electrical system of a car. In this demonstration board the actual wiring with parts and accessories of a car had been arranged, according to the electrical circuit of a car and terminals are provided to connect the battery. By giving connection the working of individual parts such as Self starter, Alternator, Wiper Motor, Horn, Head lights, Tail lamps, Parking lamps, Side indicators, Brake light, Distributor, Sparks of spark plugs, etc., can be demonstrated. The parts sectioned to show the internal constructional details. This is a working demonstration model.