The Ford alternator connector I should say. The wiring harness end.

 

Here's a diagram that might help. But simply put, in the diagram, 'A' connects directly to 'B+', and 'I' connects to the rx7 switched 12V in the harness (there's only 2 - one is constant, the other is switched -- I believe it's from/ for the dash).

 

ok so i did all this an got it on. i ran the wires the way i the pic shows. but heres the thing sometimes i start the car an it charges an sometimes it dont. then it will drain my battery i have b to 12v constant i to a 12 switched. s to stator an a to the constant on the alternator. n it drains the battery like i said i was thinking if i put a relay in the wire to the battery so it only turns on when i turn the key on. but i dont know can someone help me out please i miss driving my car .

 

Nice write up I may try this if my new alt kicks the bucket.

 

What year alt?

 

That's exactly the way I wired mine.
I just used the white/blue (stripe) wire (the thicker of the 2) from the old rx7 harness and connected that to the thick yellow/white (stripe) wire (some harnesses have different colors) from the ford alternator which is connector 'A' in the pic. I also connected the thinner white/black (stripe) wire from the old rx7 alt. harness to the green/red (stripe) wire from the ford alt. harness, which is 'I'.
I can only draw 2 possible conclusions.
A) Your connections somewhere are loose --make sure that the connectors inside the main clip to the alt. fit tightly, as well as that stator wire which is by itself. I actually cut off the old stator connector because it was soo loose and used a new small female terminal instead. Obviously check the way you connected the wires with the butt connectors or soldering you did as well.
B) The alternator is bad.

I just bought mine new (not reman) for $105