12V Ignition-On Source Underhood? - 2019 Power Wagon

[el_barto]

Have a 2019 Power Wagon, so no Auxillary Power Wiring/Switches (WHY FCA?! WHY is this not an option on the PW?!). Can anyone advise where I can tap to get Key-On power for my ARB Air Compressor? I would really prefer NOT to hook directly to the battery, I want it to be Ignition/Key-On power only, so there is no chance of it running with the engine off, killing my battery.

The compressor needs a 40Amp fuse so it needs to be a pretty hefty power source.

Page 14 of this PDF shows the general wiring diagram for this compressor if its helpful.

 

[carlrx7]

The compressor should have a relay wiring kit that goes straight to the battery. You wont find any existing wiring that can handle an extra 40 amps on a keyed ignition.

 

[Brutal_HO]

I don't see any PDF attachment or link in your post.

Wouldn't the kit come with a relay if it draws 40 amps?

There's a high power 300 Amp rated connection at the battery. Use that as the power source and a relay switched on by ignition to feed the compressor power.

Sorry, can't help much with ignition without Aux setup. I recall that some options (like center console rear USB power) have two fuse positions, one for BAT+ and one for IGN, maybe start there.

 

[el_barto]

I don't see any PDF attachment or link in your post.

Wouldn't the kit come with a relay if it draws 40 amps?

There's a high power 300 Amp rated connection at the battery. Use that as the power source and a relay switched on by ignition to feed the compressor power.

Sorry, can't help much with ignition without Aux setup. I recall that some options (like center console rear USB power) have two fuse positions, one for BAT+ and one for IGN, maybe start there.

Sorry heres the PDF:

https://www.aircompressorsdirect.com/manuals/arbckma12_24installl_2.pdf

Yes there is a Relay. From what I can tell the physical switch still receives power from the battery even if ignition is off. Now that I look at the wiring again, there is a wire Red-Yellow that is tapped to "ignition on" that goes to the switch, but I still stand behind my reasoning of having the main power source be ignition on only as well to to eliminate any chance of voltage draw when ignition is off.