TMs are
here.
Other useful manuals are
here.
Helpful thread sticky is
here.
Lots of good reading there. Do make sure to read ALL THE WAY THROUGH each thread, as there are a lot of ignorant comments that (mostly) get corrected later. For example, on the
"Can someone explain isolated ground to me?" thread, the very first response is completely wrong. (It's a classic case of a little knowledge....)
But back to your question: As mentioned, they are both 12v, but they are slightly different than a standard alternator in that they are both isolated ground. Only the passenger side
needs to be isolated, but to keep supply inventories simple, the Army made them both isolated. The driver's side is grounded normally to the chassis by a ground cable, instead of being grounded through the case like a normal alternator. The passenger side must NOT be grounded to the chassis. Smoke and fire and melted links will be the result. Fun stuff!