ARB Air Compressor

Found this one not for ARB but shouldn't matter. Pretty good drawing for what you want.

Google is your friend

Yes, you will still need the pressure switch.

Forget the wiring diagram that came with the compressor... I can understand why it would confuse you.....

Fit the pressure switch and the quick connect outlet to the compressor. Fit a simple ON/OFF switch where it will be convenient.

Fit the relay and a fuse at a convenient location; fuse should be close to the battery.

Take a heavy duty wire from + battery terminal to relay input tab, via the fuse. Leave the fuse out until the end to avoid any shorts/sparks.

If you want to be able to use the compressor without the motor being on, then run another positive cable (via a piggy-back), from the relay input (the one I just mentioned), to the ON/OFF switch. Then from the other side of the ON/OFF switch to one side of the pressure cut-off switch, then from the other side of the pressure cut-off switch to the switching tab on the relay.

Run a heavy cable from the positive side of the compressor to the appropriate output tab on the relay.

Finally, run the heavy duty negative cable from the compressor to a suitable grounding bolt on the body/chassis/engine. Likewise the final tab on the relay needs to be grounded.

Now, insert the fuse. Turn the switch to "ON" and the compressor should operate for a couple of seconds.... it will stop because the pressure switch will trigger it to turn off.

Plug the hose into the outlet and switch it on again.... it should operate continuously if you have a outlet that allows air to escape all the time.

Hope this helps. I don't have the relay numbers in front of me, but can get them if you need them....or Google is your friend.

Roachie