Woods/Dominion Off Road/Jeep Swag OnBoard Air System
I’ve been looking for an on board air system specifically for the JK and I found it in Wood’s air system. He has developed a couple of brackets for the Viair compressor and air tanks. What impressed me was that tank and compressor both mount under the hood and can be operated from a remote switch in the jeep. I can now start filling my tank before I stop to air up. His compressor bracket comes with an air junction box that incorporates a relay with an automatic shutoff that will keep my tank filled at 145 psi.
I purchased the Viair 400C compressor, a two gallon Viair air tank, including both of Wood’s brackets, the fittings, steel air hose and quick disconnect and air hose. The only parts that I had to buy separately were; some wire and a 30 amp fuse protector to connect the compressor to the battery, a remote switch for inside the jeep, wire to connect the remote switch to a power source and to the Viair relay , as well as connectors for the wires. The relay and compressor come with fittings on their wires and I didn’t want to have to cut and solder the wires, (although you can do that as well) so I bought the appropriate connectors. I got all of these at a local electronics store for under $15. (I have since talked with Woods and he is looking into selling the fuses, wire and connectors from his website.)
The instructions were easy to understand and follow. I started by installing the Air tank and bracket. I suggest putting the fittings into the tank before installing the tank and bracket on to the JK. If not it takes some maneuvering to get some of the fittings in place and tightened. I then installed the compressor using Wood’s Bracket and air junction box. I also suggest tightening all of the fittings on the air junction box, before installation.
I then mounted the air hose quick disconnect to my JK. You can choose many different locations for the quick disconnect. I decided to use an existing hole on the frame rail bracket on the driver’s side. It is concealed and out of the way. I also didn’t want to have to drag my air hose over my hood or bumper when filling the tires. I can now reach all of the tires from that position. (Although I am thinking of adding a rear quick air source) I connected the air hose from the compressor to the tank and from the tank to the quick disconnect.
The next step was to tackle the electrical side of the installation. I first connected the black ground wires from the Viair relay and the compressor to the ground point on the chassis. (It is on the side of the engine compartment) I then spliced the 30 amp fuse into the wire I bought and then connected one end to the compressor using a matching fitting and the other end to the battery positive terminal. I then connected the compressor to the relay.
I found a cool spot for the inside remote switch that keeps it hidden. The switch I bought had a led light and the back side of the switch was threaded with a plastic nut. If you take off the bottom part of the dash just above the pedals (it just pulls off) the metal that holds the dash in place has a half circle gap in it that is perfect for the switch. I now just have to reach under the dash to turn the compressor on.
I removed the center consol (there are a few good videos on the internet that show how to do this) and spliced into the cigarette lighter power (and ground for the led light to work.) I ran a the spliced wire from the lighter to the switch and then from the switch to the Viair relay under the hood. I used fittings on the end of the wires, to easily connect to the switch. To access the engine compartment from the cabin, I took a long screwdriver and poked a hole in the foam filling located on the side of the dash (If you open the drivers door and take off the side panel – just pull- you will see where there is foam filling in the dash.) I then connected the wire to the Viair relay with a matching fitting.
The system works great and is perfect for the JK. Wood's kit is great. I definitely recommend it to anyone looking for a JK air system. Send me a PM if you have any questions!
Last edited by JetDriver; 06-02-2010 at 06:21 PM.