That "single wire" alternator output wires up to the Load (NOT battery/starter) side of the ammeter, the same terminal that feeds battery voltage to loads such as lights and ignition etc. The other Supply side of the ammeter gets to the batterys hot ungrounded post, often by a wire down to where the big battery cable attaches to the start switch/solenoid. Often then theres ONLY ONE wire on the ammeters Supply side (to battery/starter) and maybe two (Alternator and wire to light/ign switch) on the Load side....
If all is wired right yet it drastically continiues to overcharge (keeps battery at say 15 volts all the time) Id say the Voltage Regulator is bad and that will cook the battery...
On the 10SI 3 wire units that one small terminal was used to sense battery voltage, maybe the alternator isnt sensing true battery voltage
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Today's Featured Article - Product Review: Kreem Brand Fuel Tank Liner - by Staff. This condition has occurred on a few machines that we have had and fortunately we were able to borrow the technique used at the local motorcycle shop. The product that we have used is called Kreem thouh there are others on the market, this one was recommended and available. This particular product is sold in three parts, a bottle of etch, dryer, and sealer. We were fortunate enough to start the process with stern warnings from those that had used this type of product before. The horror
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