I now officially have On Board Air!
I spent the day on it and got it nearly finished. A few runs to Marshall's Hardware got me the rest of the hardware I needed. I tested it and it works. I just need to install a in-line fuse between the battery power and relay, and run the wire to the battery. I found a "on in run" wire going to the electronic shift controller, which I don't use because of the 700R4 transmission, to power the relay. I did not wire in a switch as I wanted it to be a on demand type compressor, as long as the engine is running.
Pics
Mounting / skid plate
I had to notch the cross member to clear the air fitting
Rubber bushings
You can see how its going to clear the notched cross member. It now has a 45* fitting on the air line fitting. You can reach under the bumper and plug in the hose.
I had the same issue as with the auxiliary battery install; too much movement in the floor sheet metal. Hitting the side of the compressor mount would cause a noisy vibration. As you can see in the next picture, the floor has seen better days and is buckled and warped. I welded a cross brace of 1/8" plate and it took out most of the vibration, and the floor is much firmer. The carpet and pad, seems to help dampen the effect also.
Uneven cargo area floor
The fix. I also tack welded all the bolts and washers to the floor to make it easier to mount the compressor solo. I had to mount one bolt from the underside to allow the battery to be removed (passenger front)
Crappy picture of spare tire well, now filled with goodies
Compressor mount in open position for access
After I get the wiring finished to my satisfaction, I will post a few pics of the relay location and wiring. The only modification I had to make to the original compressor configuration was the copper line running between the compressor and tank was too short to go around a mounting bracket. I found the correct bulk hose at Marshall's. I used my ferrule tool to flare the ends.
I know I posted earlier about why I decided to mount it under instead of in the fender, but there were more reasons than I posted. Your opinions really helped me decide.
I was worried about heat and possibly fire.
It was a tight squeeze inside the fender.
It fits like it was made for the space in the spare tire well.
The compressor intake is nearly 35" off the ground.
Its well protected between the frame rails.
I don't do a lot of water crossings.
This quote
The other issue is if smack a wall and push that area in on the body, that thing is toast.
Don't ask me how I know this:shifty_ey
After reading this again, I figured I would be much more likely to cave in a quarter panel than scrape the compressor off on a three foot tall rock that I would have had to scrape over with my rear axle.