Old sub,
I think I have a three wire and I would like to wire it that way.
Maybe I misunderstand but it looks like the three wire in the link you sent is wired so that one wire from the DA plug on the alternator is connected to the terminal wire on the back of the alternator. That terminal is then connected to the batt terminal from the old voltage regulator. The second wire from the DA plug on the alternator would go to the ignition switch. Is that not a 3 wire configuration?
If I put a light in the line to the ignition would that function as an alt light and light up when not charging?
Thanks
Rich