Electric control system for motor vehicle

An electrical control system for connection into the electrical system of an automotive vehicle for controlling the connection between a source of electrical energy and at least one electrical energy consuming device in the vehicle, the electrical system of the vehicle including a battery and a generator together constituting said source of electrical energy, said electrical energy consuming device drawing excessive electric current from said source sufficient to discharge the battery when the generator is inoperative, and an ingnition switch for connecting said source to the ignition system of the vehicle;

• said control system including:
• a current sensative relay connected between said source and said electrical energy consuming device;
• a voltage sensitive relay connected across said generator;
• relay circuitry controlled by said current sensitive relay and by said voltage sensitive relay to terminate the excessive current flow to the energy consuming device in the event fthe current flow through the current sensitive relay exceeds a predetermined current threshold and when the voltage across the generator drops below a predetermined voltage threshold;
• a further relay connected to the ignition switch and having contacts connected in said relay circuitry for rendering said relay circuitry active only when the ignition switch is open;
• and timer means connected to said relay circuitry to render said relay circuitry effective only after a predetermined time interval.