Charging issues?

12.3 is not charging, pretty much "Yellow" and "purple" does not compute. Where/ what wires are you talking about?

What sort of alternator you run? Stock Mopar, Delco/ Denso, what?

You said a "2 pole" disconnect. Let's be clear, are you talking about "double pole" which would be FOUR terminals, (2 big, 2 smaller) or "single pole" which would be TWO terminals?

So we need details how you hooked up this relay, exactly.

I would do this SIMILAR to what you are doing, but a little different. I'd buy a nice "continuous duty" solenoid, and mount it up front, say, next to the start relay. This will become your supply point for heavy switched "run" loads, like fans, ignition, and the alternator field and regulator.

Hook one large terminal of the solenoid to the start relay stud, hook your loads on the other side

Hook either small terminal of the solenoid to the "ignition run" wire (dark blue) and run the other small terminal back to the rear.

You'll need a "double pole" IE FOUR terminal disconnect. Break the battery lead as per normal with the large terminals,

ground either of the two small terminals, and hook the remaining small terminal to the wire you ran to the rear. This wire can be a no14 or so.

THERE ARE several other ways to do this. But if you use a solenoid, you have a nice big heavy switch to cover your loads, AND either the ignition switch OR the disconnect is SURE to kill the engine fans and pump.

Looks like this