Digging this up from the past... Clinto, did you ever end up building a box? Pics?
Yes/no.
I've designed all of the box and built about 80% of it. Last thing I have to do is install the self diagnostic system (long story) and then paint the box. I then have to strip my deuce interior, paint it, install the M44A3 cab brace so I can upgrade to the M44A3 3-point shoulder belts. Once the cab interior is done, I can mount the box on the back wall of the cab.
I'll start a thread once I'm done, but the short version is:
All new cannon connectors.
Cannon connectors are mirror imaged so you can't hook them up wrong in diagnosis/servicing/repair
Each power circuit is individually fused
All wires are 14awg, other than the 12V power supply to the fuse box.
12V power comes to the box from a stand alone 12V battery that's charged by my HMMWV 12-24 dual output alternator
This box has a provision for a 12V electric trailer brake controller - the small 4 pin cannon connector send the 12V supply and 12V trigger to the controller and the brake voltage comes back into the box via the third wire and is sent down range to the civilian 7 pin connector at the back of the truck.
There is a provision for fused 12V power at the dash as well, for cell phone charging.
All electricals in the box are mounted on a piece of plastic so it can be removed for easier servicing or if the box is damaged.
When I posted this a dozen years ago, I thought a box that was mobile between multiple trucks would be the best idea. But the difficulty of getting trailer brake functionality into the equation was so high that I settled on a permanent box in the pulling truck, which means if you own multiple trucks you have to build multiple boxes. If all you need is the lights on your civilian 12V trailer to work with your military truck, XM381.com builds good converter boxes that do this.
Here's what I have so far:
![20180318_102451.jpg 20180318_102451.jpg](https://www.steelsoldiers.com/data/attachments/507/507328-490186ca4854bae355d5bfe4920ac78e.jpg)
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![20180704_212033.jpg 20180704_212033.jpg](https://www.steelsoldiers.com/data/attachments/520/520435-76678f98e1fbd5e55224f091aebad474.jpg)