[Roadsters] Delco 10SI Alternator question

[Andy Cost]

It should take 12 volts at the F terminal to excite the alternator.  If you don't hook up any excite wires then the alternator may self excite when it reaches 3500 rpms or something like that.  It is very possible that is why you weren't charging at idle.  Try putting 12 volts to the F terminal.  The other terminal is a ground for the battery idiot light if I remember correctly.

I could be completely wrong.

Andy