With the remaining 12' or so of air tube, you are going to put one end in the other side of the "Y" fitting at the compressor. When you are done it should look like this:
Ok, so your compressor is done for now. We will come back to it later for the wiring.
Now, run your air tubing down the frame, there are a few holes you can run it through to minimize zip-tie use. Here is what I did:
^Rear Cab Mount.
I ran my air tubing through the rear cab mount and the forward bed mount.
On your fuel tank, there is a plastic handle. Run your lines through it like so (to keep them away from the driveshaft and the hot exhuast):
^See the red tubing running through the handle?
If you do not have the handle there are several other ways to route the tubing. Just be sure to keep it clear of spinning parts, suspension components and away from the exhaust.
Now run your tube to the back of the truck, right in front of the spare there is a u-shaped bracket attached to the frame with a hole in it:
Run your tube through it and STOP. Cut it there and add a "Y" fitting.
then run tubing to your bags from each side of the "Y"fitting:
and ziptie to your differential vent tube or your axle carrier itself. THIS IS IMPORTANT!!!: **Ensure you leave enough slack for 12 INCHES of suspension travel. The airbags, depending on your setting will allow up to that much, so if you do not leave slack between the bags and that last "Y" fitting, you will yank your air lines out the first time you hit a bump or raise your truck.**
For the electrical, its pretty simple. Just follow the tubing with the wiring. I needed extra wire because of where I put the compressor, it ran me $5 at lowe's.
The install for the electrical:
From the gauge you go:
Once at the battery, the white wire will get the fuse and get installed onto the positive battery terminal. The black wire will continue on to the compressor. Once at the compressor, you will connect the black wire (still a power, not a ground), to the RED WIRE on the compressor. Once you do that, you have 2 options. You can remove the connector thats on the black wire coming from the compressor, and put in a butt splice, then run a separate wire back to the negative battery terminal for the ground. OR you can grind the paint off a spot on your frame near the compressor and ground it right there. I always choose to run the ground back to the negative battery terminal if I can.
Once you connect your ground, the circut is completed and the compressor will work.
A couple of video's-
Inflate to 20 psi from 0:
Deflate to 3 psi from 20:
And an install walk-through