I'm adding to Bob Ms good advice. If it is a 3 position switch, and the H has a regulator on it, (either from the factory, or retro fitted) the switch is lights only and the first position is for dim headlights and full rear lights. The far right position just puts the headlights on bright, leaving the rear bright. It can have an affect on the charge, only by loading the system with the lights. If it is a four position, it is as Bob indicates. If it it does not charge in the H position (first click clockwise from being full counterclockwise) then it may be wired wrong. In the first position (Full CCW), the field wire from the small terminal on the generator is attached to a wire wound resistor on the back of the switch, the other end of this resistor is attached to the switch terminal that (when in that position) is grounded to the light box. This allows partial grounding of the field, which turns on the field enough to charge at a low charge rate. The turning of the switch to the right one click bypasses this resistor, fully grounding the field. If nothing happens at this setting the wiring is either misconnected, or the switch is faulty internally. With it running, at medium speed (and having shown a charge when in the first position) then, with the switch set in that second (non-working) position, use a jumper wire to ground the field terminal at the generator. With this grounded, the generator should now charge (usuallly 8 amps to 12 amps or so) If this happens, the wiring or switch is at fault, as this is what it is supposed to be showing on the meter. Good luck, and keep us informed either to continue, or to let us know it got fixed. JimN
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