Alternator wiring

OK, you are using a 70/ later "isolated field" alternator with two field connections

WHAT are you using for a regulator?

If you are still going to use your original 69/ earlier regulator all you need to do is:

Connect the battery output post just like the old alternator

Connect your regulator (green) wire to one of the two field connectors.

Ground the second field connector

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If you are going to change to the newer 70/ later regulator, connect the green field connection on the regulator to one of the two field connections on the regulator

Connect the OTHER field connector at the alternator to "ignition run."

This may be where the splicing your are referring to. You want to hook this second field connection to the blue "ignition run." factory wireing. This used to go two places. One is the coil resistor, the other is the ign terminal of your old regulator.

So now it must go to a third point, the new second field connection.