When the switch is full CCW from the knob point of view, it is off. in that position only one of the terminals will be isolated from every other terminal. It is the input from the amp meter. In D position one end of the resistor will be full voltage (or no resistance) from that input terminal. That is to be left not attached to anything. with that same test, the other end of the resistor will show about 1/2 voltage, or 4 ohms or so. That is the end attached to the main headlight wires. When it is turned to B, that same terminal should have full voltage or no resistance from the input terminal. In either D or B positions other terminals should go to instrument lights, full volts, or to the rear light. (RL) I believe the rear light gets full volts on either D or B positions. The light on the tractor shining on the tillage equipment (rearward) is switched at the light housing to red with a switch knob, it is not selected to be red at the main light switch. It could be that one of the positions only has one terminal connected. If that is the case it is possible that that is the rear light, and is for use as rear light only. (my best guess) Jim
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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