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AC 712 Shuttle

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Got this last fall and trying to mow with it this year with multiple problems. the 3 wire plug coming out of motor seems to have like 12-13 volts but the battey dooesnt get any it it. cleaned all contract and discovered ut dosnt appear to have a voltage requlator!!! what do the three wires do?

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thanks for link, but i dont see a 3 wire diagram?!?!?! i see 2 and 4 wires. my 716h has a big old regulator/rectifier on the side of motor but this 12 hp doesnt seemd to have any?????

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UPDATE - the three wires are AC & DC and the COIL!?!?! this model has the coil wire going into the block and out the other side to the coil!! Cleaned every connector and found a diagram that shows NO voltage regulator for 712S. determined it "might" be the ignition switch cause when I jiggle it it shows charge, of course dealer says switch is a backorder item???? What was confusing is the plastic plus has the three wires moulded in. Hopefully this problem is solved when switch arrives!

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