My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug

Question

Question:

My brother SVE only has a 4 plug adapter but my trailer is hard wire for a 7 way plug. What adapter do they make to change the 7 way plug over to a 4 wire plug?

asked by: James B

0

Expert Reply:

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part # C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give you trailer light functions. If your trailer has a 7-pin connector, then it likely has electric trailer brakes and an onboard battery.

If you want a fully functioning 7-way trailer socket on his vehicle, then the installation will be a bit more involved, but we have a kit that contains pretty much everything you will need in part # ETBC7. This kit still uses the same adapter I mentioned above and it also comes with the additional wire and hardware you will need. I attached an installation video to show you how a kit like this is installed.

The only component of the towing setup that this kit doesn't include is a brake controller which will be required if you need to use the trailer's brakes. If you want something inexpensive that will get the job done, I recommend picking up the Tekonsha # TK63VR and wire harness # 20127.

expert reply by: John H

0

Timothy

3/31/2024

Hey John, If I have a vehicle with a 7 pin connector and trailers with 4 pin connectors, is there a 7 pin and 4 pin combo unit with a mount that allows me to use either the 4 or 7 pin connection (basically converting my 7 pin to both 7 and 4 pin connections at the same spot)? Can't seem to find this anywhere. Thanks.

Reply

John H.

4/12/2024

@Timothy There are, but the amount of work you might have to put into installing one will depend on what you currently have. If you are comfortable splicing wires, the easiest way to make this change, in my opinion, would be to install part # HM40975-11998. You can simply screw the bracket into the underside of your bumper or somewhere back by the hitch and splice the wires from the pigtail into the wires going into your 7-way. This product comes with a wiring diagram to help you understand which wires are for which signals.

Reply

Jos

6/4/2024

Hi John, would that kit #ETBC7 also charge an RV battery while driving? Thanks, Jos.

Reply

John H.

6/6/2024

@Jos Yes it will. It won't revive a dead battery, but it will top off a battery that is in good working order and it will maintain that battery's charge when towing.

Reply

Answer 1

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

view full answer...

Answer 2

Hey Antoine, so the two kits you mentioned are actually really similar and honestly I would go with the part #ETBC7 if I were you. The #ETBC7L is basically the same thing minus a couple wires and breakers so you may as well get the kit that has…

view full answer...

Answer 3

Hello Ron; the best trailer hitch for your 2024 Kia Telluride SX X-Line is the etrailer #e45ZR. All of the hitches have a similar design and specs but the etrailer hitch stands apart with its matte black finish. This gives it an OEM look and also…

view full answer...

Answer 4

Hi Artie, So there isn't a trailer hitch with a standard towing capacity above 5,000 lbs for your 2024 Kia Telluride SX Prestige X-Pro. There is a trailer hitch that jumps to a 6,000 lb towing capacity when you use a weight distribution hitch…

view full answer...

Answer 5

I have a few different options for you, an air controlled trailer brake controller like the Hayes Air Actuated Trailer Brake Controller part #HA100400C or an electric controlled trailer brake controller like the Tekonsha Prodigy P3 Trailer Brake…

view full answer...

Answer 6

There is only one difference between the Curt Trailer Hitch Receiver #C13176 and etrailer Trailer Hitch Receiver #e98909 that fit your 2020 Chevrolet Colorado, which is the finish. The Curt trailer hitch has a glossy black finish while the etrailer…

view full answer...

Answer 7

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

view full answer...

Answer 8

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…

view full answer...

Answer 9

The Curt Front Hitch for the 2008 FJ Cruiser , item #31367, and the setup you are describing should work well, as long as the multi mount you are referring to is designed to fit into a 2 inch receiver. If you already have the winch but not the hitch…

view full answer...

Answer 10

In order to install a 7-way trailer connector on a 2022 Mazda CX-9 you'll need to start with a 4-way, the T-One Vehicle Wiring Harness for Factory Tow Package part #118278 which is plug-in-play. Then you can adapt this into a 7-way using the 4 to…

view full answer...

Answer 11

Hey Brent, If your 2020 Jeep Grand Cherokee has the factory tow package then you'll be able to plug in the Pollak 5th Wheel / Gooseneck T-Connector #PK11893-33-32. It may be necessary to see a local Jeep dealer to activate the tow package wiring…

view full answer...

Answer 12

If you have a 4-pole wiring setup now and you want to install a wireless trailer brake controller you will use an adapter like Curt #C57672 or Hopkins #37185. Both install by plugging in to your 4-pole and by making additional wiring connections…

view full answer...

My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug

Products Referenced in This Question

Product Page this Question was Asked From

Featured Help Information

Instructions

Miscellaneous Media

Continue Researching