10si alternator

[MARKDTN]

I'm a bit lost in the description but: Main lug goes to main lug. #2 on alternator should have 12V all the time. Some just jump it to the main lug. #1 on alternator goes to the light on the dash.

But I'm confused why you changed the alternator to internal regulator if you just left your lights on? Seems like something else is going on?

[Awann99]

Originally Posted by MARKDTN

I'm a bit lost in the description but: Main lug goes to main lug. #2 on alternator should have 12V all the time. Some just jump it to the main lug. #1 on alternator goes to the light on the dash.

But I'm confused why you changed the alternator to internal regulator if you just left your lights on? Seems like something else is going on?

I left my lights on and it killed the battery. The next day my battery was dead so I had the alternator tested. It failed. The parts store only had a 10si in stock so I installed that. Now it drains my battery over night. Not sure why. With the 1&2 plugs hooked on it drain .01 bolts every second. I unplugged the 1&2 and the drain stops. Could I install a diode in the key on wire to stop the draw?

[zosoppp]

Here's a link to one of the many many threads on the conversion to internally regulated alternators (10si or 12si).

http://67-72chevytrucks.com/vboard/s...d.php?t=362957

[Awann99]

Originally Posted by zosoppp

Here's a link to one of the many many threads on the conversion to internally regulated alternators (10si or 12si).

http://67-72chevytrucks.com/vboard/s...d.php?t=362957

Thank you. I'll take a look at this.