So I decide to use an alternator from a b2200 on a rx7 fc 86 the tricky part is when I plug in the connector a relay on the CPU turns on and the idiots/warning light turns on so how can I find a solution for this? Hope all of you can help me!

 

my first question is why? Is it actually a higher amp alt? And without knowing how the wiring is on a B2200, gonna be tough to help you

 

Why? I live in El Salvador and it's hard to find things of rx7 and the unique alt that I can use with same amp it's that but it's a reasonable observation what about the wiring ? I search and nobody got the wiring diagram !

 

Idoit cluster lights up when the alt is no good. So youve probably got a bad one/wiring issue. Maybe terminals are reversed? Did you research this swap or just plug it in?

 

^ this. have you confirmed it's actually charging?

 

Look at the Ford Taurus write ups there's diagram in those thread with s4,s5,ford alt conversion

 

First of all I reverse the terminals and the idiot cluster lights gone normal maybe this would be and second I made a several research and it's the same position for the fc s4 alt harness and at the same time I just plug it in!

 

By the way here's a pic of the alt or how it looks !!! Obviously I just use the T connector the other one I just research it's for the choke for the b2200

 

In this forum or outside?

 

I bought it refurbished so they tested the alt and it's functional maybe the wires position change on the b2200?!

 

here ya go:https://www.rx7club.com/2nd-gen-arch...r-swap-963821/

 

exactly why i'm asking if it's actually charging YOUR car. check it.

if worse comes to worst, there has to be a B-series truck site that has links to a wiring diagram.

as a matter of fact, here:
Mazdatrucking.com Forum
MazdaBScene.com - Mazda Truck Owners and Enthusiasts

 

Kind of like what I was saying earlier...

 

This is the thread I'm talking about . I see 13.7 or above since the swap . I found stock ford alt connects for clean install . I didn't have to extend my bracket or grind down anything . I think it has to do with the Cosmo serp belt setup I have though so most will have to mod .like the thread says