I have spent the last 2.5 hours looking through past posts and searching to no avail.

I am trying to find a proper wiring diagram that I can use on my 2004 Ram 2500 Quad 4x4. I am installing 'on board air' and would rather use a cleaner setup than running new wires when there may be unused(spare) wires that may be between the fuse/relay box under the hood, and in the cab. I would also like to use a spare fuse location and/or relay location in the fuse/relay box. If there is a location anywhere on the web that has this kind of info I would love to find a link.

Thanks for any assistance that can be provided.

Matt

 

It's all in the service manual located for download here... https://dodgeforum.com/forum/3rd-gen...-download.html

 

While you can certainly use that manual and find the fuse box and what fuses are what, it will not be accurately reflective to your truck because different trucks come equipped with different options and therefore may be wired different at the PDC (fuse box).

I run on board air also but all you need is one wire from your relay going to the battery. Thats not very messy.

Also, check out this link

http://www.viaircorp.com/OnRoad/Sche...singlec_wd.pdf