Civy truck to MIL trailer wiring info

[namedpipes]

i wish I could post video to easier explain lol.

While using 24v bulbs with 12v power, the bulbs would only properly work(left/right/brake/hazards/running with my truck running.
I have now changed out to 12v bulbs and it seems to have fix that issue but I will be keeping an eye on it.

To me it sounds like a grounding issue or maybe a connection with corrosion / high resistance. When the engine is running there's enough voltage to "force" the issue. The issue could be in the trailer OR the truck.

[Traveltocamp]

To me it sounds like a grounding issue or maybe a connection with corrosion / high resistance. When the engine is running there's enough voltage to "force" the issue. The issue could be in the trailer OR the truck.

That’s what I’m thinking. The truck is new(2016)....my guess is the trailer.

[WSTEPHENS]

I ordered this pig tail from EBay and bought a set of 12V replacement bulbs for my trailer.
pig tail.jpg

[dougco1]

I ordered this pig tail from EBay and bought a set of 12V replacement bulbs for my trailer.
pig tail.jpg

I did the same thing, no chopping wires and it works great.

[WSTEPHENS]

I haven't hooked up to the truck yet to make sure everything works yet. I will tomorrow and check everything out.

[CallMeColt]

I wanted to share my video here as it may be helpful.

Also, here is what I found for wires with a 4 pin & 7 pin harness.

For a 7 pin harness;
Green goes to 21
Brown goes to 22-460
Red goes to 22-461
White is the ground

For a 4 pin harness;
Green goes to 22-460
Yellow goes to 22-461
Brown goes to 21
White is ground

[CallMeColt]

Attachment 716763Can anyone tell me what this is and what it does? Thanks.

It is just part of the pigtail that would attach to the military truck. Basically is a rubber block that has connections in it that you can't get too. You can see it in the video I posted in the post above this when I remove my military pigtail harness.