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Wiring for a trailer

Kenneth Cole

Active member
179
40
28
Location
Wapiti Wyoming
Good day everyone and a Merry Christmas and a Happy New year.
I have mounted a trailer hitch and a connector so I can pull our 1959 Streamline trailer. My question is seeing that the Humvee is 24 volts and the trailer is 12 volts I'm not sure how to wire this.
I can't see running each wire through the converter to drop it to 12 volts nor can I see changing all the lightbulbs in the trailer to 24 volts. Maybe one of these choices is what I have to do.
I may be missing some other way.
Need your help.

Thanks
Ken Cole
 

Kenneth Cole

Active member
179
40
28
Location
Wapiti Wyoming
Good day everyone and a Merry Christmas and a Happy New year.
I have mounted a trailer hitch and a connector so I can pull our 1959 Streamline trailer. My question is seeing that the Humvee is 24 volts and the trailer is 12 volts I'm not sure how to wire this.
I can't see running each wire through the converter to drop it to 12 volts nor can I see changing all the lightbulbs in the trailer to 24 volts. Maybe one of these choices is what I have to do.
I may be missing some other way.
Need your help.

Thanks
Ken Cole
 

MattNC

Well-known member
222
270
63
Location
Raleigh, NC
I ordered the adapter from XM381.com I have no affiliation with them but the mounted converter worked great and also maintains the military socket for resale value sake. It is not cheap but very well made and also gives you the future ability to add trailer brakes and a controller if needed.
 

Coug

Well-known member
Steel Soldiers Supporter
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the XM381 adapter is the best deal I've seen for one, and I haven't heard anything bad about them either. I'll be getting one once I finally get a 2" receiver
 

Chief B

Active member
169
64
28
Location
Milton, FL
When I got mine it already had the XM381 installed and I’ve never had any issues. I like the fact that I have options for pretty much any connection. Here are some pictures of my setup

The unit itself mounted under truck


12v connections


24v connection


Hitches



Sent from my iPhone using Tapatalk
 

Ajax MD

Well-known member
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Location
Mayo, MD
Does the XM381 guy ever respond to email? I've sent a couple of questions over time and never received a response.
If you order one of his converter boxes what's the usual lead time?
 

Coug

Well-known member
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Location
Olympia/WA
Does the XM381 guy ever respond to email? I've sent a couple of questions over time and never received a response.
If you order one of his converter boxes what's the usual lead time?
back when I ordered mine I don't remember it taking any extra length of time to get here or anything; just a regular "order it and it's here in a week or so"
 

Ajax MD

Well-known member
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113
Location
Mayo, MD
Yeah, this went from a "want" to sort of a "need." I'm wondering if I can get it in time. Ah well.
 

Coug

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Olympia/WA
Somewhere on the site there is the diagram to make it yourself.
I opened mine up once. It's a 24-12V buck converter, and some relays. Really not much to it. Putting that into a case, then making up a bunch of wires to go to the various places you need to connect to in the truck, plus the trailer plug are the hardest thing about it.
 

papakb

Well-known member
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Location
San Jose, Ca
Why are you bothering with this gadget when all you need to do is install the wide range LEDs in the existing lamp sockets? There's no rewiring involved and replacing the lamps is as simple as removing the covers and replacing the bulbs. Our world is complex enough without creating issues.
 

Coug

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if it's your trailer, and it's the only one you will ever tow, then LED multi voltage bulbs and a wiring adapter plug will work fine, and are definitely the less expensive and easiest to do modification.

If you're like me and can be towing any of a dozen different trailers, most of which aren't my property, on short notice to get a job done, then the converter box makes life much simpler, and you don't have to worry about where you left the fracking plug adapter every time (and find someone else grabbed it when they borrowed the trailer you were using and are currently in a different state with it...)
 

Fwilson

New member
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1
Location
87123
if it's your trailer, and it's the only one you will ever tow, then LED multi voltage bulbs and a wiring adapter plug will work fine, and are definitely the less expensive and easiest to do modification.

If you're like me and can be towing any of a dozen different trailers, most of which aren't my property, on short notice to get a job done, then the converter box makes life much simpler, and you don't have to worry about where you left the fracking plug adapter every time (and find someone else grabbed it when they borrowed the trailer you were using and are currently in a different state with it...)
Where can the coverer box be purchased? by chance do you have a part number?
 

Coug

Well-known member
Steel Soldiers Supporter
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3,973
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Location
Olympia/WA
Where can the coverer box be purchased? by chance do you have a part number?
They have several variants depending on what you want to do with it.
Personally I installed the ruggedized frame mount version which is just a little stronger case.





Then my thread involving installing the hitch, brake controller, and converter box.

 
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