Hi,
Putting together my rebuilt 5vz for my 3rd gen 4runner and I needed to replace my alternator. I previously swapped in a ca144 alt. At the time I purchased a backup but it is a little different. It has the same plug but an additional 3 Prongs on the rear. What are they for? What do I do with them? Can I just put some heat shrink on them?
Thanks!

New with prongs

Old without prongs.

 

That is the model for the heated windshield. I saw many posts saying this is the one to get but, it is not the best choice. It must still work because of all the threads where people used that one. I never saw how they addressed the prongs though. This is the one I will order when I get to that point.

 

I have learned that the pins are three phase AC output for the Cadillac windshield heater system. You can leave them unconnected.
As the diagram shows, when the windshield heater is not on (which is almost 100% of the time the car is being driven) the relay is open and the pins are effectively unconnected.
I covered mine in adhesive lined heat shrink but am debating cutting them off.