Ok folks, I'm now stumped...I know there have been many posts on this subject and I have learned alot from reading almost all of them but now I'm stumped. Here's teh situation and what I've done so far:
Truck: 2006 Ranger reg cab, 3.0L 4x2
Issue: Battery drains from ~12.3v to ~10.1v overnight
Troubleshooting so far: Alternator checked and working as advertised. I assumed I was getting a draw somewhere so I disconnected the negative terminal from the battery and connected a meter to the cable and the post. I was getting about a 4.6A draw. I then started pulling fuses from the engine compartment without any noticeable change. Meter went from about 4.6 to about 4.3/2 at times. Moved on to the fuses in the SJB, still nothing significant. Frustrated I went back inside to do some more digging on the internet. When I went back out, I decided to ditch the meter and try a load light. I connected it in the same way I did the meter...clip to the negative battery cable and light to the post. I then started the drill all over again each fuse resulted in no change to the brightness of the light, which was extremely bright. I then decided to disconnect each of the connectors at the SJB. When I disconnected C2280B the light went out, so now I've narrowed down my search. I found that pin 20 was slightly corroded. I also noted according to the schematic attached that there should be a constant 12v power at that pin, which leads me to believe that something down stream of that wire is pulling power...correct assumption? IF I am assuming correctly, I just need to find a schematic that shows what's after that connection...

If anyone has anyother ideas I'm all ears. This site has been great in getting me to this point, sooo much information.

 

Welcome to the forum

You should pull out the SJB and have a closer look inside it, that corrosion may be wider spread where you can't see it

Article here on whats inside the SJB: https://www.therangerstation.com/tec...horn_mod.shtml

Here's the deal, you pulled all the fuses and didn't see the drain go away, but it did go away when you unplugged that connector................so the drain is not on a Fused circuit, can't be or unplugging that fuse would have stopped the drain

So must be inside the SJB, behind that corroded area would be first place to check