When converting to SI alternator the 1 lead goes to the gen light. This is after of course you make the appropriate changes at the regulator. If you are not using a generator light do you just leave this wire disconnected or should it be grounded??

Thanks

No, it must be connected or the alternator won't charge. Did you remove the light or is it a factory gauge car? (some aftermarket alternators like powermaster can be wired as a 1 or 3 wire and would charge if not connected.)

No, it must be connected or the alternator won't charge. Did you remove the light or is it a factory gauge car? (some aftermarket alternators like powermaster can be wired as a 1 or 3 wire and would charge if not connected.)

Thanks Greg, the light is removed, as in not being used anymore.
I guess maybe the way I should word this question is. If you were starting form scratch, as in no existing wiring at all, and wiring an alternator. Where would you run the wire off that lead on the alternator?

If you were starting form scratch, as in no existing wiring at all, and wiring an alternator.

The alternator BAT terminal gets wired to the main electrical junction, alternator terminal 2 (sense wire) gets wired to the same place as the BAT terninal. Alternator terminal 1 gets wired to a IGN only hot (power only when key is on) through a bulb and/or a resistor.

Originally idiot light cars had a bulb and a resistor wire (bypass wire, a 20g brown w/white stripe on a 70). This was so, in case the bulb burned out the charging system would still work.

Original gauge cars only had a resistor wire.