Hm, I was not aware of that. That's interesting and is now added to the bank of stupid things that shouldn't be but I have to remember. At least the pinouts are the same, which, given the amount of stupid things in the mechanical world, is rather surprising.
just send power to each cable and see what lights up on your trailer plug; it has an led light indicator for you. colors don't matter, its the connection.
It's easier to just check continuity like I did, no need to run back and forth to the back of the trailer. Colors matter if the standard is followed, but there is 2 different standards I learned after making this video. 2 standards is completely stupid.
YEP... just got my harness for my utility trailer and the colors don't match my vehicle and can be confusing for anyone else who uses the trailers. the harness i ordered was for a rv set up. unfortunately no one makes a utility harness 7 way that matches the gmc or gm older wiring diagrams colors. the 7way either has a purple or black wire to replace the LT GREEN wire that is the backup wire for the trailer lights. the colors on my suburban are : brown for lights, green for right side, yellow for left side, white for ground, red for HOT , blue for brake controller and light green with stripe for the reverse lights. I'm reordering a new harness with purple wire that i'll use as my reverse Lighs
Yeah, and it didn't work right. I matched the colors up like one logically would, then found out the functions were all messed up. Then made this video before I fixed it. You think I made this up? Go buy one of those plugs and hook it up to a non RV trailer and match the wire colors, then tell me how well it works for you.
i don't understand why they change the colors from one vehicle to another and for each different trailer...ie: boat, RV or utility trailer. Just keep it simple and make them all the same for 7 way plug and harness
Blue is supposed to be for the brakes on the SAE standard, but I actually learned something by making this video. I was unaware of it when I recorded this, but there is actually 2 different standards for wire color. There is the SAE standard that I am used to and had previously thought was the only one. Then there is the RV standard that I didn't know existed until a commenter informed me of it, which I feel, shouldn't even exist.
There is actually 2 different standards for wire color on trailers. There's the SAE standard that I've know for years, which most trailers I've messed with follow, then there is the RV standard that many, if not all, of these pre-made harnesses use that I didn't even know existed until after I made this video and a commenter brought it to my attention. My best advice is to look up both standards on Google or whatever search engine you prefer (the drawings are readily available) and go from there. Alternatively you can use a multi meter and screw around for an hour or more figuring out the color vs function like I did 🤣
There's no "standard" color code on 7 ways. Depends on what type vehicle or trailer you're working with. I think e-trailer had a video dealing with that. (I think it was them, I know somebody did). The cord should have come with a legend to tell you what's what, unless it was a complete cord that had both ends , so it didn't need to be wired. Edit here's the link. It was to a channel called " My RV works" ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-IUArUBP2lEA.html&si=3sWYrBeeNjNuAnzB
Yep. I didn't know that there was actually 2 standards prior to making this video. I was only aware of the SAE standard. The fact that the RV industry decided to make their own is completely stupid and pointless, and just complicates what should be simple.
That’s a trailer problem not the 7 way it is supposed to be standard. I worked for jayco and the fuckin wires were always wrong or they’d even use the same color for different shit
This was not a trailer problem. On the new harness the running lights were the green wire, 12v hot was black, right turn was red, left turn was brown, and reverse lights were yellow. The brake being blue and ground being white were the only 2 that followed the standard in the video, which for decades is what I've always understood to be the correct one. The trailer wires followed that standard. I'm not surprised with your experience with Jayco. I've been through 2 different Forest River plants inspecting trailers our company bought and the craftsmanship is just atrocious. Quantity over quality. I'm surprised more of them don't fall apart going down the highway.
