wiring alternator direct

[John H]

My buddy bought a 2001 explorer cause his sis rolled his prev 2001 explorer 3 days ago. Anyway when i looked at it after he bought it i realized that the 4.0 in it looked exactly like the one in my 2001 ranger not his rolled 2001 explorer. Ok problem is he bought it & thought the alternator was bad because it wasnt charging,he bought a new one put it in and same thing not charging. Since he works for oreillys we took it back checked it & its fine. All of the wiring looks fine & I discovered the yellow/wht strp wire has a constant 12V & there is continuity from alt to battery. my question is if i wanted to wire the alt like a switched source to the exciter what wire do i use there is a green/red strp & a wht/blk strp wire. what wires would i use to wire to a switched source to get the alternator to charge? Any info appreciated

 

[riverviewcontracting]

we just had that problem when we did the 4.0l swap in my buddy's 87 ranger it is the green/red and just tap it into any keyed hot wire (we did it to the fuel pump wire and it works great)