You don't "need" an indicator light. It is NOT necessary if the wire from no. 1 alternator goes to a DIFFERENT terminal on the ignition switch than where the battery hot wire is connected.

You can have a light if you want it wired as you have shown.

Don't get confused with a common point for now. I realize you are new to wiring so I am keeping it simple. Just wire it and start motor and test alternator output as I described. NO WIRES TO the old Voltage regulator.

Can you PLEASE confirm you have a 12V battery.
Can you post good pictures of your ignition switch and it's terminals or make a drawing.

Be sure to tell us what the alternator output voltage is,, don't just say "no sign of life".

If you need a new alternator THIS is the one you need.

Last edited by bartamos; 01/02/2023 9:10 PM.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn