24v trailer wiring

[rob love]

Always glad when all that redundant info floating around in my head can be of use to someone. Good luck.

Depending on the age of your trailer harness, it may or may not have the 22-460 and 22-461 wires marked. It may just say 22. The 22 will be the rear left (22-461) while the wire coming off pin J will be 22-461.

[Harry Moon]

Recently when ordering LED bulbs for my trailer I remember them being 12/24 volt bulbs. If you just switched to LED bulbs would that work?

[rob love]

The multi-voltage LEDs are becoming more and more common. They will not solve the trailer connection problem, but are ideal where you want to switch the trailers between SMP and commercial towing.

The Truck-lite SMP tail lights (the large plastic kind) are now available in 12-36 volt range, and are also perfect for a jeep trailer that occasionally gets towed behind the family pickup.

[maple_leaf_eh]

Originally Posted by Stuart Fedak

I have attached the wiring diagram from the M101 CDN2 trailer, which should be the same as your M151A2.
...

Cheers!
Stuart

Could you dumb it down a little bit. All those straight lines, numbers and obviously deceptive symbols are confusing me. I keep thinking that in 1953 Motor Coach Industries would have been more technically advanced. *Sarcasm mode off*

Originally Posted by Stuart Fedak

...

If you had posted your question last week, you could have come to the Diefenbunker event on Saturday, and I would have given you some 24 VDC bulbs
...

Cheers!
Stuart

Although it might sound implausible, I had something else happening that day.

[Scott Bentley]

Originally Posted by maple_leaf_eh

Although it might sound implausible, I had something else happening that day.

Judging by the pics, it looks like it was an Iltis Kids get together anyway. God forbid one of us M Series guys showed up.... All the ridicule Iltis Owners get requires a pack mentality

[Scott Bentley]

Originally Posted by Stuart Fedak

Scott, not sure how your comment relates to a NATO trailer plug, but what the heck, it's OK with me. I guess you are referring to the recent Diefenbunker event?

ref: http://www.mapleleafup.net/forums/sh...ad.php?t=20321

Yupp.... I think it is great that some of the local MIL vehicle community can come out and do some public service living history events. It is OK, us Iltis Kids are very inclusive, and would enjoy sharing a burger with the M series guys and gals.

Cheers!

Stuart

Stuart, I never miss an opportunity to take a little poke in jest at the Iltis guys

It looked like a great event. Sadly, my Day Job kept me away.

[maple_leaf_eh]

Originally Posted by Stuart Fedak

I have attached the wiring diagram from the M101 CDN2 trailer, which should be the same as your M151A2. You can also source 24 VDC bulbs from commercial truck service centres in Ottawa.

It is just a matter of swapping in some 24 VDC bulbs, Make a good quality harness and you can lend it out in the Ottawa region...........

If you had posted your question last week, you could have come to the Diefenbunker event on Saturday, and I would have given you some 24 VDC bulbs........

Cheers!
Stuart

I've tried troubleshooting the wires and connections. How does the ground connect to the trailer wiring harness? It is a round spade fitting, but I've never known any fittings other than the rubber cable.

[Robin Craig]

Just a word of caution on "NATO" plug wiring and trailers.


There is a clash between North American and (you knew it was coming) British NATO connections.

You might wonder what I'm jabbering on about but let me explain. There is a presumption that all NATO kit is inter operable.

We found to our cost over the years when trying to connect a British prime mover ie Land Rover or Bedford to M series trailers that things go squirly.

The reason is that the British stuff uses a separate bulb for the turn signal but the North American uses the brake light.

Just in case anyone has aspirations of towing things

R

[Robin Craig]

Stuart,

there is no question that you are a learned fellow, but sometimes you miss the point hugely.

What I'm saying is NATO truck to NATO trailer does not work a times, that was the point I was trying to get across.

R

[maple_leaf_eh]

I decided to complete the M100 CDN trailer with its 24v lights using the heavy rubber connection cable between the trailer's harness and the M151A2's receptacle. This is why I was puzzling over those 24 possible combinations of connections, plus ground. This way I get a finished trailer and a tested connection. It will be easier to make an adaptor for the accessory magnetic lights.

But I'm beginning to wonder if that famous guy Previous Owner properly connected the trailer receptacle. I had no luck finding 12v on any connection combinations I tried. Then, of course I found your drawings.

Once the trailer is wired, I (*ahem*) may need to borrow a small wheeled 4/4 SMP vehicle to confirm the tests. Stuart, as I recall you don't live too far away from me in Otter-wa.