Re: 12V one wire alternators

Posted by John T on September 04, 2006 at 16:35:14 from (66.244.90.5):

In Reply to: 12V one wire alternators posted by Ray Martin on September 04, 2006 at 15:40:40:

Ray, If its a true One Wire alternator its easy to hook up BUTTTTTTTT most all are for Negative Ground you know, so if your tractor is Positive Ground you would need to change it over.....

Iffffff the tractor has an ammeter, the alternators big output stud would wire up to the ammeters Load side terminal and I would use 10 Gauge wire. The ammeters Load side terminal is the terminal that used to wire to the BAT terminal on a Voltage Regulator or Cutout Relay and is the same terminal that feeds hot battery voltage to other loads like lights and/or ignition. The ammeters other Supply side terminal (only one wire to it) is the one that wires to the battery, often at a starter switch or solenoid where the big battery cable attaches.

If you have to convert to Negative ground the batterys - then goes to frame while its + goes to the starter switch or solenoid. Also the ammeter leads would need to be swapped and if it has a coil ignition instead of a Magneto the coil leads get swapped also.

Some one wire alternators require a higher RPM to kick in and on some theres a small trickle discharge when shes setting. Many people use the 3 wire GM 10 SI alternator instead and wire/configure it to work like a one wire.

John T

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