Purchase a 4 position switch from industry. (5 terminals, one supply, and 4 terminals that can be turned on) Use 3 Diodes from an alternator output bridge as follows: Assuming you want OFF at full Counter ClockWise (CCW), between each terminal other then the "off" position place a diode that conducts electricity (depending on tractor ground) back toward that first "ON" terminal 2.
First ON terminal 2 goes only to headlights, and can't get to the others through the diode to terminal 3.
Terminal 3 "ON" electricity goes from terminal 3 to second set of lights and back through the diode to terminal 2, to headlights.
Terminal 4 "ON" electricity goes from terminal 4 to last light circuit lights and back through the diode to terminal 3, and back through that through its diode to terminal 2 All are now ON.
There might be a tiny voltage drop, but I do not think it will be substantial. Jim
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Today's Featured Article - Chores - by Frank Young. The ceaseless passing of time! It is at once our friend and our enemy. It measures our progress and it makes us old. Like most features of our life, few things are all good or all bad, and most such judgments depend on our own perspective or viewpoint. In our particular hobby, we enjoy the nostalgic return to the days of our youth as we recreate many of the scenes that took place on the family farm that served as the stage for the first few acts of the play that is our live
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