charging problem

ok i figured out what was causing the fuse to blow, there was a open wire inside one of the lights. but i still cannot figure out why the generator is not charging.the gen is good. i have spark when i jump the hot terminal to the ground. i also have all connections on gen cleaned up. it has a cut out relay and 4 position switch, all wired correctly. i have light box to steering post to rearend connections clean. i was able to follow all of john t's diagram to the grounding the light switch, what part needs grounded? is there something im missing?with good gen, good switch, good ammeter, good wiring, good battery im still not getting a charge... thanks

If the gen does not charge when the field terminal is grounded (on the gen with all wires connected and the engine at 2/3 throttle, there is either a bad regulator cutout close voltage, or the gen is not making field contact inside, or the field windings are open. Do johns Motor test of the gen! Jim

To expand on Jims response and answer your question about what gets grounded.

ITS EVENTUALLY THE GENNYS FLD POST THAT NEEDS A GROUND and the path is from FLD on genny,,,,,,,via a wire up to light switch,,,,,,,,,via EITHER the Field resistor on the switch (Low charge) or direct to frame ground (via the switches ground) for High Charge.

Try as Jim noted to ground the Gennys FLD post directly. If she then charges that tells me the Genny itself is okay, so the problems theres no ground connection via the light switch circuit (dead ground for High Charge, resistive ground via switch resistor for Low Charge)

The other thing is the Cutout Relay MUST close so the gennys output can get to the battery to charge it. Its open when tractor is setting but when running once/if the gennys voltage exceeds battery voltage IT CLOSES. THE CUTOUT RELAY ALSO NEEDS A GOOD GROUND TO WORK. When running if you temporarily dead ground the gennys FLD post but still no charge you can jump past/across the relay by momentarily wiring its BAT to its GEN/ARM and if it charges then but not otherwise the relay is bad or not well grounded.

If the gennys passes BOTH my Motor tests it ought to charge iffffffffffff alls wired right and FLD is getting a ground per the above

John T

which terminal on the gen is the field? there is an "F" on the cutout and a "F" on the gen

The "F" stamped on the generator case is the field terminal. The generator may not be polarized correctly.

The one with the F Jim