Yes, but that voltage you are sending has to have a return path back to the source. The small black wire MAY connect to the main black and black/white. You can check it with a meter. If it does then you don't need to connect it.
HELL NO! They cannot power that kind of current draw, but you can use one to trigger the relay on the compressor and run the large twin power leads to the battery.
There are two of the four, I believe 3 & 4, that can control the compressor, but you do have to keep the relays in the harness to do so.
Here: https://store.arbusa.com/content/CKMTA12_Installation Guide.pdf
So you have red X going through parts of it. Reason for that? Will I just be connecting the purple reds and blacks to prospective connections? + - and aux switch? This is only for tire fill and occasional raft filling. Slightly confused.Here: https://store.arbusa.com/content/CKMTA12_Installation Guide.pdf
Specifically this page:
The purple wire in connector #2 is what you would connect to an Aux switch to turn the compressor on. I have mine wired to the Aux #4 wire found in the passenger footwell. You need to run the two red wires with the 40 A fuses to the battery (I ran mine to the same disconnect switch that my winch is wired to). The black and black with white stripe wires don't need to go directly to the negative battery terminal, ground stud in the engine compartment works fine.
The black wire in connector #2 is only there to serve as a ground for the LEDs in the ARB switches, I left it floating.
The purple wire also powers the cooling fan, as well as energizing the two relays.
The ARB schematic is assuming you have the ARB air lockers in your front and rear differentials. If you don't, or aren't planning on adding them in the future, you can ignore what is X-ed out.
Did you happen to run one without re connected to the reds. Or two separate wires. One 8 gauge is equivalent to 40-55 amps. Should be ok I'm guessing. Tie the two reds together and one to battery?
I'm not quite getting what you're asking. Where are you trying to mount the dual compressor? I mounted it under the passenger seat and the wiring that is attached to connector #1 in that diagram is long enough to reach the positive terminal of the battery.
Driver's seat. Figured I'd be getting out anyways so why have to open the passenger door and turn it on. Plus the wife is always in there as well.
I'll suggest cutting and then crimping in extensions to both red wires on the compressor side of the fuses. Keep the fuses as close to the battery as you can, minimizing the length of unprotected "hot" wire running through the engine compartment. On this page ARB has the max draw of the twin compressor at 68.6 amps.
