wiring adapter

[allie]

Anybodty know how to convert the military 24v outlet on my m931 to accept a civilian common trailer plug that would allow signals etc to work?

 

[country]

COM-3255 | Trailer Electrical Plug Converter 24 volt to 12 Volt converter
Trailer Electrical voltage converter. Converts 12-pin 24 volt military trailer plug to 7-pin 12 volt.
NSN #:
Price: $1,075.00

 

[98G]

@silverstate55 has a 12v box and brake controller on his M931A2. Maybe he'll chime in with the details.

 

[m715mike]

Google “Military 24v to 12v trailer converter”. There are several options.

I didn’t purchase one, but I remember checking this out:

XM381 - 24 Volt Military Truck to 12 Volt Civillian Trailer Lighting Converters

 

[simp5782]

Just buy a intervehicular cable with the 12pin to 12pin or the plug off of a m116/m200 that goes 12 to 4 wire.

As long as the trailer has LEDs it should be fine.

If you wanted you can use inline reducers for each light and function in the plug harness. They are like $6 ea

 

[allie]

COM-3255 | Trailer Electrical Plug Converter 24 volt to 12 Volt converter
Trailer Electrical voltage converter. Converts 12-pin 24 volt military trailer plug to 7-pin 12 volt.
NSN #:
Price: $1,075.00

wow def not gonna pay that much any other options?

 

[silverstate55]

Google “Military 24v to 12v trailer converter”. There are several options.

I didn’t purchase one, but I remember checking this out:

XM381 - 24 Volt Military Truck to 12 Volt Civillian Trailer Lighting Converters

That’s the one I use, since 2015 so more than 6 years of use. NO problems whatsoever, I recommend it. Works great on semi-trailers, goosenecks, 5th-wheels, and bumper pulls.

 

[simp5782]

On ebay

WELDON FTM-2412 M871A3 SEMITRAILER NOSE BOX WITH CONVERTER | eBay

In such cases you will receive item in similar condition, however the serial number could be different than pictured. No cords or accessories included. "Only what's pictured.". MORE PHOTOS AVAILABLE UPON REQUEST.

www.ebay.com

 

[Micmada]

Just buy a intervehicular cable with the 12pin to 12pin or the plug off of a m116/m200 that goes 12 to 4 wire.

As long as the trailer has LEDs it should be fine.

If you wanted you can use inline reducers for each light and function in the plug harness. They are like $6 ea

Yep. I Simply use two 12V lights in series or a 12V light in between the truck and each trailer light, instead of 24V lights. It is cheaper and more reliable too. No need for an expensive converter, ugh, do a bit of circuit math. Each light drops the voltage by 12. The bonus is you can have lights blinking in front/side (or where er you put them) and back of trailer. $5 incandescent and $8 Led at the Napa trailer section (do not go for the lights at their electrical section, these NaPa brand LEDs are $40-60 !)

An alternative is to use a $35 battery equalizer ( I use two of them) and run a 12V line from one of the batteries to the trailer tail light. The battery equalizer will save your batteries from any imbalance causing the control box and alternator to go funky anyways, whether you set it up that way or not, so I highly recommend getting it from Amazon in their solar panel set up section. I use two of them instead of one just in case the amps get too strong for any reason and in case one fails.).

 

[98G]

Yep. I Simply use two 12V lights in series or a 12V light in between the truck and each trailer light, instead of 24V lights. It is cheaper and more reliable too. No need for an expensive converter, ugh, do a bit of circuit math. Each light drops the voltage by 12..

That is not how I understand it.

 

[silverstate55]

Yep. I Simply use two 12V lights in series or a 12V light in between the truck and each trailer light, instead of 24V lights. It is cheaper and more reliable too. No need for an expensive converter, ugh, do a bit of circuit math. Each light drops the voltage by 12. The bonus is you can have lights blinking in front/side (or where er you put them) and back of trailer. $5 incandescent and $8 Led at the Napa trailer section (do not go for the lights at their electrical section, these NaPa brand LEDs are $40-60 !)

An alternative is to use a $35 battery equalizer ( I use two of them) and run a 12V line from one of the batteries to the trailer tail light. The battery equalizer will save your batteries from any imbalance causing the control box and alternator to go funky anyways, whether you set it up that way or not, so I highly recommend getting it from Amazon in their solar panel set up section. I use two of them instead of one just in case the amps get too strong for any reason and in case one fails.).

Been There Done That...and then some. Got tired of having so many problems & issues related to “easy” and “quick” fixes, I didn’t mind finally spending the money on the XM converter box...installed one on a Deuce as well, and both are still working flawlessly several years later. No regrets; if I ever need to buy another one, I would do so without hesitation.