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It would be very easy to wire up a 'U left the light on' chime. You would use a 6v NC (normally closed )relay, and a 6v buzzer. From the light switch, you have the wires running to the lights. also tie in a wire to a buzzer to ground. Next, take that NC relay.. it will have 4 connections... + and - and 2 switch contacts. Wire the - up to the ignition switch, so that when the ignition is on, the relay is getting power. The + will be wired to ground.. ( assuming you are positive ground. ) That leaves you with the 2 switched contacts. cut the wire for the buzzer, and hook one side of the wire to one contact.. and the other side of the wire to the other contact. This is what happens in that circuit. When the lights are on, and the ignition is off: the buzzer is energized by the light switch, and sounds , as the relay is unpowered.. and in the 'switch-closed' position, allowing the buzzer to operate. When you turn the ignition on to start the tractor, the relay is energized, and the contacts 'open' halting power to the buzzer. That way you don't have a buzzer going off the whole time you have the lights on. Also with this method.. using a normall closed relay. there isn't anything drawing power while the tractor is off. Of course if uoi leave your ignition switch on... you will drain your battery from the relay and the points.... relay draws next to nothing though... milliamps. Some relays will have both nc and no ( normall open ) contacts, and a common terminal. If you use one of these.. choose the common connection and the NC connection. I like that design.. I think I'll call it the 'light thang'... ( humor ) Soundguy
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