How To Connect 4-Way Flat Vehicle Connector To 7-Way on Trailer

Question

Question:

I have a 4-flat on my vehicle. I want to connect to 7-round on my trailer. Do you have a cable or a coiled-cable for this? Thanks in advance!

asked by: Bill H

0

Expert Reply:

To connect your vehicle that has a 4-Way flat connector to your trailer that has a 7-Way connector, you will need to install a 7-Way on the rear of your vehicle. If you just want or need the tail light functions to operate on your trailer you will just need Adapter 4 Pole to 7 Pole, part # 37185. If you need the complete 7-Way wiring to operate, you will need Brake Controller 7 & 4 Way Installation Kit, part # ETBC7.

The 4-Way on part # ETBC7 will plug into the 4-Way on your vehicle and then you will need to connect the remaining wires. The White wire is the ground and should be connected to the frame of vehicle. The Black wire will be connected to the Black wire inside the duplex cable and ran to front of vehicle and connected to the battery via included 40 amp circuit breaker. The Blue wire will be connected to the White wire inside the duplex cable, and ran to the front of the vehicle and later will be connected to the brake controller. The Purple wire can be connected to the reverse lights if trailer has reverse lights or can be taped off and tied out of the way if not being used.

Installing a 7-Way on your vehicle will allow you to install a brake controller on your vehicle to activate the brakes on the trailer if equipped or for future towing needs. Part # ETBC7, will allow you to have both a 4-Way and 7-Way on the back of your vehicle.

If you need a brake controller, email me back and I would be happy to recommend one. Also if you need a brake controller, let me know the year, make and model of your vehicle as some vehicles use a plug-in harness to install brake controller.

I have linked an FAQ on wiring and on installing part # ETBC7 that you may find as a good reference.

expert reply by: Reno H

0

Answer 1

In order to actuate the trailer brakes, you'd need a brake controller installed in the vehicle and a 6 or 7-way trailer connector. A 4 pole flat wiring harness like the #18002 you'd looked at carries 4 circuits- right turn/brake lamp,…

view full answer...

Answer 2

We do have a locking hitch pin availaible for the 3" receiver on your 2017 Ford F-350. I recommend using the Fastway Trailer Hitch Receiver Lock - 2", 2-1/2", and 3" Hitches - 3-5/8" Span #FA86-00-3160.…

view full answer...

Answer 3

One way to determine the lift and jack height you need would be to measure the jack you currently have on your 2018 Intech Luna RV. If this is not possible, or you still aren't sure, you can also determine the correct jack using the coupler…

view full answer...

Answer 4

I would be happy to help you set up your 2022 Toyota Highlander to haul your new travel trailer. The wiring harness you currently have controls your trailer's lighting functions only. You do not need to rewire your Toyota you just need another…

view full answer...

Answer 5

The EcoHitch Hidden Trailer Hitch item #EH35VR you were looking at is the only hitch available for your 2023 Highlander Hybrid that is compatible with a 20" spare. This hitch is custom fit and bolts to your Highlander with included hardware. I…

view full answer...

Answer 6

The trick here is to get as close as possible. If you are talking about less than 2 inches or so, there is nothing to worry about. Having the trailer tongue a bit too high is preferable to it being too low. You may be a good candidate for an…

view full answer...

Answer 7

I would be happy to go over all of the differences between the Curt Trailer Hitch #C67JR, and EcoHitch #EH34FR for your 2021 Subaru Outback Wagon. Starting with what they have in common, they all have a hidden crosstube meaning that once installed…

view full answer...

Answer 8

Congrats on the new vehicle! To install a 7-Way harness on your 2024 Hyundai Tucson, you will need two separate wiring harnesses because they don't make just one that'll do the job. The first harness you'll need is the Curt T-Connector…

view full answer...

Answer 9

Since your 2022 Tucson already has a 4-way connector you will need the Universal Installation Kit for Trailer Brake Controller item #ETBC7. The kit includes a pre-wired 7- and 4-way trailer connector that mounts easily at the rear of your Hyundai…

view full answer...

Answer 10

According to my research, the Aliner Ranger Trailers did come standard with 10" electric brakes so you will need to install a 7-way trailer connector and a brake controller on your 2007 Toyota RAV4 in order to tow it. For this, you will need a…

view full answer...

Answer 11

Although the #118243 shares the same rectangular plug located on the driver's side frame rail as later models, Tow Ready only confirms it as a fit for 1999-2001 Super Duty trucks while the #118242 fits the 1997-2003 F150 and the 2004 F150…

view full answer...

Answer 12

You will still be able to use the trailer with the 4-Way after installing the 4 to 5-Way adapter, #20036. First, you could just remove the adapter if you wanted to and then plug in the 4-Way like normal while stowing the adapter in the truck. The…

view full answer...

How To Connect 4-Way Flat Vehicle Connector To 7-Way on Trailer

Products Referenced in This Question

Product Page this Question was Asked From

Featured Help Information

Instructions

Miscellaneous Media

Continue Researching