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I will be installing the ARB CKMA12 air compressor (normal 25A, MAX 32A) and wanted to simplify the wiring in the back. I plan on using the upfitter #5 (40A) for this task. Running at 8g wire from the upfitter tail to the back by the spare tire in a 7way Junction box. From 7way junction box to the ARB. Since the upfitter is already a switched relayed fused can I just remove the fuse and shorten the ARB wires? I would keep the diode in the harness. The idea is to have the junction box for other stuff like possibly a 25-40A DC/DC charger for the trailer. I wouldn't be using both simultaneously. Any thoughts or suggestions?
This is actually a good idea.. I don't see why you'd have any issues with this. Where are you mounting the compressor itself? There was a guy here on the forum who mounted a dual ARB up inside the bedside and I believe he used the backside of the boxlink brackets somehow. Just interested in how others are mounting theirs.
I just installed a viair 200psi kit on my truck. The wiring really isn't that bad. I rand the included, fused 8ga wire up front along the frame rail to the battery distribution block in front of the upfitter fuse / relay block. While I was running that, I ran 2 16ga wires with it, one to an upfitter to turn the compressor on and off, and one to my horn. The pressure valve that came with the kit has a built in relay for power, so the smaller wire is a trigger, if pressure drops and my upfitter is off, it won't kick on, if pressure drops and the upfitter is on, it kicks on. Either way, you'll probably be running a few more wires depending on what your doing. I tapped all the grounds into the frame rails locally.
Do you think more tanks or a slightly bigger compressor would be a better option?
I want more volume for longer blasts. A bigger compressor won't do anything, besides, I already have the biggest compressor viair makes. They do have kits with multiple compressors, but all that does is fill the tank faster.
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