Adapter for 7 pole rv to 4 pole round?

brandonrv wrote:

FIRE UP wrote:
brandonrv,
Yes Sir, they make adapters for 7 pin RV plugs to any configuration you want, 4-pin flat, 4-pin square, 4-pin round, 5-pin round, 6-pin square and more. DO NOT CHANGE THAT PLUG ON THE RV!! It's most likely wired by the factory and is well done and to national color coding and pin placement. It might be useful at a later date when you might wand to hook up a larger trailer etc.

One of the first things you must do is, make sure that the wiring/pin arrangement in your seven pin RV plug is configured so it will match up to the 4-pin round correctly. We've owned four different RVs, (2) Class Cs, and (2) Class As. All four came from the factory with 7 pin plugs. As did and does, about 99.9999% of all the pickups sold in America.

Most of your adapters can be found at Camping World, or any other well supplied RV Supplies outlets. One of the nice things to have around is an "LED", 7-pin plug checker. I just got one from a local swap meet for about $5.00 and man, is it great. You can check the out put right at that plug and see if all is good every now and then.
Scott

Thanks, scott. Maybe that's the problem with my adapter. The pins don't match up. I'll look at getting one of those 7 pin testers. Maybe I can figure out how to rewire it.

brandonrv.
So many folks make this too hard. It's incredibly simple. If you don't have the experience or the tools to do some trouble shooting, then maybe a neighbor or a friend could lend a hand. Like I stated, DO NOT CHANGE THE 7 PIN ON THE COACH! It does sound like the company that did the Jeep wiring for you was clueless. We've owned (7) of those darned Jeeps and you can wire them blind folded and not screw up.

Those testers I told you about only test them, they do not tell you what pin is what. If you have a 12V test light, (they're cheap if you don't have one) you clamp the wire on a known good ground, then, with the help of an assistant, like the DW or friend, have them:

1. Turn on Running lights, check which pin it is in the 7 pin plug
2. Turn on the ignition, and a right turn signal, check which pin
3. " " " " " " Left " " " " "
4. " " " " Check if you have a "Reverse" wire/pin

Now, this is where it gets only a tad more difficult. If you have amber turn signals, then you may, I say MAY, have a separate brake light wire/pin in the 7 pin plug. If you don't have amber turn signals on the coach, then each turn signal pin will also act as brake light signal too.

And, just in case either the factory or, the previous owner got their little hands in there and did some pre wiring before that plug, and, you've got amber turn signals, you could also have a "Tail light" converter which, combines the turn signal and the brakes in each pin. If, you don't have amber turn signals, you still will have a combined turn signal/brake light for each side. The remaining pins are for ground and a possible wire for electric brakes. But for your Jeep, all you need is four wires. One for "Tail marker" or, (running lights as we old timers call them), one for the right turn signal/brake, one for the left turn signal/brake and one for ground.

When you get your tests done and , noted on paper, then just match them up on the four wire/pole adapter. Now, this all presupposes that the dingbats wired the Jeep correctly. Too bad you're not near me, I'd come over and get it done in about 20 minutes for you. Good luck.
Scott