Battery saver headlight switch

An automatic headlight switching system adapted to be mounted to an automotive vehicle which has as existing equipment the following

• (a) a manually operable headlight switch having an "on" position and an "off" position,
• (b) first mating electrical contact means connected to said headlight switch,
• (c) a wiring harness having second mating electrical contact means connected to automobile headlights and adapted to engage the first mating electrical contact means so as to establish contact between the headlight switch and the headlights,
• (d) an engine having a pressure source that provides first pressure level with said engine operating and a second pressure level with said engine not operating,
• said automatic headlight switching system comprising:
• (a) an adapter adapted to be positioned between said wiring harness and said first mating electrical contact means, said adapter having a third mating electrical contact means adapted to interfit with said first mating electrical contact means and fourth electrical mating contact means adapted to interfit with said second mating electrical contact means,
• (b) a pressure responsive switch means electrically connected between said third and fourth electrical contact means, said pressure responsive switch means adapted to be connected to and be responsive to said pressure source in said automotive vehicle, in a manner that said first pressure level causes said pressure responsive switch means to close, and said second pressure level causes said pressure responsive switch means to open,
• (c) an over-ride switch means connected in parallel with said pressure responsive switch means between said third and fourth mating electrical contact means,
• (d) a manually controlled over-ride operating member to move said over-ride switch between its open and closed positions,
• whereby when said vehicle has its engine running to create said first pressure level at said pressure source, the pressure sensitive switch means is caused to close to enable the headlights to be turned on by the headlight switch, and when said engine is not running, said pressure responsive switch means is permitted to open and shut-off said headlights, with the manual over-ride switch being able to be operated to turn the headlights on even when the engine is not running.