Arrives before Christmas 
| If your truck has the connector on the left, and your trailer has the connector on the right, you will want this adapter. | |
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| Vehicle End | Trailer End |
Similar to 18142 and 30702
California residents: click here
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Randy: Hey guys. It's Randy here at etrailer.com. We get questions all the time from customers asking us how they can get their 7-pole to work with different style connectors. What we're going to look at today is from Hopkins, and this is a 7-pole to 4-pole adapter. This is going to plug right into our 7-pole. It's going to give us the functions we need for a regular 4-pole plug.
Basically what that means is that we can run a 4-pole trailer connector just like this through our 7-pole plug by using this adapter.This is going to eliminate the need for us to modify our vehicle's wiring, add a separate 4-pole onto it. And it's also going to reduce the need for us to replace the plug on our trailer and switch it over to a 7-pole round or something like that. They plug in really nice and easy. There's a couple things that make this one a little bit different than what we're used to out of these adapter. One's going to be the lights that we see here.
This is going to give us signals and indicate to us that our running lights are working. Our left turn and brake are working, and our right turn and brake are working. If we hook up to our trailer, plug it into our truck, and the lights on our trailer aren't working, as long as these lights are working, we know it's not our truck. It eliminates 50% of the possible problem. And we can do the work on our trailer that we need to.Something else that I like that we don't always see on the adapters, some of them have them, some of them don't, but that's going to be a cover.
It's going to go over and protect our connection. Now you could leave this installed on the back of your truck if you don't use your 7-pole. And I recommend taking it out and throwing it in the glove box, something like that. We always recommend using dielectric grease, but if you're going to leave it installed, I highly recommend it.Basically we're going to put that on both sides of our plug. It's going to prevent moisture from getting in.
If we can prevent moisture, we prevent dirt from being built up in there. And if we don't have moisture, we don't have dirt, we're not going to have corrosion. Corrosion on our prongs on both sides can lead to a lot of lighting failures on our trailer. Using a little bit of grease, keeping it on there, it's going to prevent most of that.Now as far as installation, just going to lift up our cover, then we're going to slide in our plug just like that. At that point, we're going to take our 4-pole, plug it in like that. We're going to be ready to head down the road. As you can see, that's a really quick and easy solution to a common problem. Now to show you how the indicator lights or the LED lights on there are going to work, we'll turn on our headlights. You'll see the light come on. We've got our left turn signal, our right turn signal. And then they'll both come on for our brakes.Now I really like this adapter. It's more compact than some of the other ones I see. And I also like that it has the cover and it has the lights. If I was looking for a 4-pole only option, I'd definitely choose that one. If you wanted to upgrade that slightly and have some more adaptability available, I might go with 78118. That's going to be a 7-pole to a 5-pole adapter. That fifth pole can be important if you want to run reverse lights on your trailer. So when you hit reverse in your truck, the lights come on in the trailer. You can see where you're going. Or in a marine application, not really like this, but some of them have a surge coupler here on the front. That surge coupler as it squeezes applies brakes on the trailer. So in that application if you back up without an electric lockout or a manual lockout, the trailer won't go. The brakes will be applied.You can also use that fifth pole for your electric lockout, so when you hit reverse, your trailer will back up. Outside of that, I think this would be an excellent decision. As far as how it's made, how it fits together in the fit and finish, Hopkins has done a really good job on all the seams. There's no gaps. There's no cracks. Really no over mold on the plastic. You can tell they've really taken their time to make a very good product.
Great service! Awesome Products!
Works to design.
great piece.
works like it should
Just what I waslooking for
Product as described. exact fit. Great adapter, doesnt feel cheap
does exactly what i thought and saved me a lot of work.
JUST WHAT I NEEDED TO COMPLETE THE JOB. VERY EASY TO INSTALL JUST PLUG IT IN.
this was the easiest thing to do. again.
thank you
clarence rovberts
Product works great. Like the tester lights on the side. Good price.
Product arrived fast.
Installation instructions easy to follow.
Good Customer service.
Thanks
Great to keep in glove box when you need the 4 pin for small trailer ect. Easy to insert and remove
Excellent Product. Exactly as advertised. Many products purchased from etrailer.com. Always prompt delivery.
This adapter is great. It works as it is supposed to.
eTrailer shipped the item immediately!
This product is well-made and exactly was I was anticipating. I would recommend this product to anyone looking for a 7 pin to pig tail adapter.
Quick and easy adapting to 4 wire trailer harness. Test lights will be handy for trouble-shooting trailer wiring
I purchased a new wire harness for a new SUV. I needed a 4 pin connection so bought a 47345 adapter to convert a new 7 pin harness to a 4 pin flat connection. The new harness didn't work after installation. I told the installer that something was wrong with the installation because none of the LEDs worked. It was discovered that the new harness wasn't installed with the required fuses to complete connections and conductivity. Now the new harness installtion is complete with much needed fuses and works beautifully. Kudos for a great 7 to 4 pin adapter, the 47345 .
Great product. Fast service. Item was as advertised. Its just plug and play. No rewiring. Plugged adapter into 7 pole socket, plugged 4 pole into adapter and all lights worked and I was off to the lake!!!! Love the tester. Lets you know that all is well. Cover is great if you want to keep it plugged in.
Just what I needed when my vehicle came only with a 7 pole connector and my utility trailer has a 4 flat connector. Well made, works well.
Works great! Bought a hitch option on my 2025 Santa Fe… came with 7 pin adaptor but now way to hook up a 4 pin so I could rent a trailer… now I do!
Works as stated, just plug in to7 pin connection on car, and plug 4 pin to trailer.
Nice feature w/ led lights to check if connection is good
Great hitch, perfect fit and quick install on my '17 Nissan Frontier S King Cab.
The Factory Tow package light install is outstanding for a plane-Jane truck like mine. Easy install. My only complaint is that it doesn't come with a mount bracket. I picked one up local, but decided to mount the connector in the steP-bumper for more protection.2" hole saw is perfect, and #10 stainless screws with washers and lock nuts.
Adapter with the test lights is perfect for making sure everything is working.
Great set up, about 1 hour total install time start to finish.
I found this to be the best model due to the l.e.d indicator lights. The other options were the red or blue glowing adapters or none at all. It works perfect and appears to be very well made. Converts a 7 pin plug (1 center 6 in a circle) to a 4 pin plug (three female one male).
Thank you again etrailer for having such a large selection of products and excellent customer service!
Would be a good product if it were compatible with my Rivian R1T. The truck detects the draw of the indicator lights and insists on staying in trailer mode. I had to buy one without lights. I may or may not have used the compatibility feature of your website but you should be sure that it is set to not recommend this product to Rivian owners
Worked great, matched up with the trailer light receptacle on my Kia Borrego like a charm. Very pleased.
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