I think we've discussed portable and vehicle mounted air compressors a couple of times here lately. So here is a brief write up on an install I did this weekend.
Wife and I both have a Jeep JL with an onboard ARB single high output 12v compressor. My primary wheeling buddy passed away in May '24. He had a diesel Rubicon and we always just aired up all eight 35s with my compressor. It never hit it's duty cycle doing that, but more air is better. We're finally getting back on the trail with his wife, daughter, and a friend of theirs in several Jeeps this coming weekend at Crossbar Ranch in Davis, OK.
Been talking about doing a lower cost install in (now) her Jeep. So I ordered a Vevor off Amazon for ~$112 and some other parts.
The Vevor is nearly identical to the ARB and ~1/3 the price. Both will install inside the Jeep body behind the driver tail light.

The Jeep has factory Aux switches with leads under the passenger dash and under the hood next to the battery. I ran a heavy primary lead from the battery to a mega fuse block and a light gauge switch wire off on of the 15 amp aux leads next to the battery. They come together into a woven wire loom, across the front of the Jeep, through the firewall, and along/behind the driver side floor panels, until they're at the back corner. A 1/4-inch plastic air line/push to connect setup follows the same route.
Behind the tail light there is a pinch seam on the body that the mounting bracket/mount plate are sized perfectly to grab a hold of.

And the the compressor.....

Goes in it....

From there it's pretty straightforward process of connecting the primary to the supplied relay, the relay and compressor grounds to a nearby body grounding stud, the aux switch lead to the compressor's pressure switch, the pressure switch to the relay, and the compressor hot to the relay.
Don't have extra pics, but I run the 1/4-inch line to both front corners and a wye at the rear using push to connect fittings. Then make 3 short and 1 long quick connect leads with clamp on air chucks. This lets you air all 4 tires up/down together at the same time/to the same pressure. There's a line run to the driver seat to connect a pressure gauge to monitor the tire pressure while in use.
Wife and I both have a Jeep JL with an onboard ARB single high output 12v compressor. My primary wheeling buddy passed away in May '24. He had a diesel Rubicon and we always just aired up all eight 35s with my compressor. It never hit it's duty cycle doing that, but more air is better. We're finally getting back on the trail with his wife, daughter, and a friend of theirs in several Jeeps this coming weekend at Crossbar Ranch in Davis, OK.
Been talking about doing a lower cost install in (now) her Jeep. So I ordered a Vevor off Amazon for ~$112 and some other parts.
The Vevor is nearly identical to the ARB and ~1/3 the price. Both will install inside the Jeep body behind the driver tail light.

The Jeep has factory Aux switches with leads under the passenger dash and under the hood next to the battery. I ran a heavy primary lead from the battery to a mega fuse block and a light gauge switch wire off on of the 15 amp aux leads next to the battery. They come together into a woven wire loom, across the front of the Jeep, through the firewall, and along/behind the driver side floor panels, until they're at the back corner. A 1/4-inch plastic air line/push to connect setup follows the same route.
Behind the tail light there is a pinch seam on the body that the mounting bracket/mount plate are sized perfectly to grab a hold of.

And the the compressor.....

Goes in it....

From there it's pretty straightforward process of connecting the primary to the supplied relay, the relay and compressor grounds to a nearby body grounding stud, the aux switch lead to the compressor's pressure switch, the pressure switch to the relay, and the compressor hot to the relay.
Don't have extra pics, but I run the 1/4-inch line to both front corners and a wye at the rear using push to connect fittings. Then make 3 short and 1 long quick connect leads with clamp on air chucks. This lets you air all 4 tires up/down together at the same time/to the same pressure. There's a line run to the driver seat to connect a pressure gauge to monitor the tire pressure while in use.