This P/N: 47185 "Multi-Tow" ADAPTER, as Hoppy (Hopkins Manufacturing) now calls it, is a wonderful upgrade or add-on to ANY vehicle that will be towing multiple types of light and heavier-duty trailers. The 4-flat is commonly used for light duty trailers, for lights only, and no brakes on the trailer. The 7-way flat-pin, round-body connector is typically used on trailers with electric brakes, most commonly with "landscape, car-hauler, & equipment-hauler" trailers. Just install this "multi-tow" plug at the rear of your truck, as NEAR to your receiver hitch tube as possible. I personally like mounting it so that the plug(s) face the receiver tube, (just like the 2nd generation '94-'02 Dodge Ram trucks had their OEM plugs mounted). This allows for the least amount of pulling and tugging on the plug connection when the trailer's wire lead and plug are easily routed along the hitch ball's pivot point and over to the Multi-Tow plug connector when hooking up your trailer. Once mounted in the included bracket, you can wire this Multi-Tow Adapter into your vehicle's tail light wiring harness with ease. It's best to use a vehicle specific wiring kit that is also offered by Hoppy, Reese, and many others, for tapping into the rear lights wiring harnees at the weather-pack connectors, and a 4-flat connector at the Multi-Tow end. If you are installing the electrical brake wiring and controller for your 7-way connector, get some heavier gauge wires (at least 12ga, or even 10ga wire is very best), run them up the frame to the battery and to the brake controller in the cab. I'd also recommend an in-line fuse to be installed in the power (+) wire that goes to the battery. Then, splice those wires into the included wiring on this Multi-Tow adapter for the trailer brakes at the rear of the truck. The 3 wires that you will run are for the power (+), ground (-), and blue sending wire for your brake controller that will be mounted in the cab, below the dash. With limited electrical experience, you should be able to install a Multi-Tow Adapter Plug unit into your truck, RV, or car in a professional manner in around an hour or two. Most recently, I personally installed a Multi-Tow Adapter on a 1998 Chevy K1500 pickup in under 1/2 hour, WITHOUT connecting any of the trailer brake controller wiring (I just zip-tied up the 3 electric brake controller wires until I have time to install my brake controller in the cab and the additional wiring needed along the frame rail for the trailer brakes). Be certain to use heat shrink tubing on all crimped or soldered wiring connections, and/or use liquid electrical sealant (like tape, but wayyy better). Also be sure to use dielectric grease in the plug ends to keep out moisture and corrosion. If you need trailer brakes, be sure to purchase an electric brake controller also, if your vehicle doesn't already have one. They are fairly easy to install, but, if you don't know how to do it, or are not confident in your ablities, most experienced mechanics will do a brake controller install along with this universal Multi-Tow Adapter and any other harnesses needed for a fair price. You may also need an additional wiring harness that is vehicle specific for under the dash of your truck for hooking up the trailer brake controller. Most pickup trucks built since the 1990's have wiring harnesses available either aftermarket or at the dealership to keep from "hacking into" your factory wiring harness in the cab.

Good harness for the money, does the job. I wanted a plug and play unit for my f150 with factory 4 flat, but I had to wait for delivery and i didnt have time for that as i was expecting to tow a travel trailer/rv the next day with the rv plug and i needed it done. You will have to splice your own positive (battery +) trailer brake and reverse lights. On the f150 the wires are all there and i didn't want to cut them but I had no choice. This is also about $50 cheaper than the direct fit unit. I had to buy some 14 guage wire though to extend the wires coming from the harness as they were short. Is fairly easy to install, the directions only tell you the colors on the wires from the harness not your vehicle, so a little Google search might be necessary. Not a huge deal. I also added a ton of dilectric greese (just a tip) add is somewhat permanent and exposed to the elements, helps prevent corrosion.