I'm guessing left/right running light aka parking light wire join inside to go to one pin.
I think 4-pin is the standard, at least on newer vehicles. I’ve seen 5-pins on my uncle’s old farm Dodge. That thing has gone through Hell and back and still runs like a top, and I’m not a fan of Dodge by any stretch. Oldies still hold together better than the new stuff.
I'm guessing left/right running light aka parking light wire join inside to go to one pin.
Connectors and adapters on ebay. https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2510209.m570.l1313&_nkw=5+pin+flat+trailer&_sacat=0
The 5-pin is not very common plug.
The only place that I’ve ever had to use one is on the trailer hookup to my Gold Wing motorcycle.
It’s been awhile since I did the hook-up, but if I remember correctly, I think it required a separate feed for the brake lights, L & R turn signals, ground and running lights.
Depends on the specific application, and how your vehicle wires the lights.
Any folks that have towed witth a Jeep XJ know all about non-conforming plugs and wiring.
1) Do you have a trailer with a 5-way plug?
B) Do you have a vehicle with a 5-way socket?
III) If the answer is ‘no’ to both of the above, why are you even worrying about it? Just get the 4-way to 7-way adapter and get on with your trailering life...
I bought a new boat last year and the trailer had a 5 pin when we went to hook it up for a final test drive.
I looked at the dealer and said “I’m not buying it unless you give me an adapter.”
This is going to sound like a weird suggestion, but have you tried your local U-Haul? They install trailer hitches but also carry parts for older setups.
I had my SUV wired for a seven pin plug so I could tow my travel trailer. It took them forever to get it wired correctly since my brake lights were separate and apart from the turn signals.
I think it’s common nowadays for seven pin adapters to be standard. Then if you need a four pin you can buy that additional plug-in.
A 1980s Miley horse trailer I have uses a 5th pin to power an overhead light inside the box. Newer ones use a round connector.
When it comes to trailer light replacement, go directly to LED. Especially if it’s a boat.
Most folks around here don’t use any.. their utility trailer lights are what’s on the pickup towing them.
My opinion only - 7 pin on the vehicle, 50 cal ammo can with adapters (4 pin and 5 pin), a couple of screw closed carabiners, spare light bulbs and a couple of short chains.
Makes a decent emergency kit.
My 2007 SUV uses the five pin. Works just fine, too.