Determine Between Factory 4-Way and 7-Way Trailer Connectors

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Question:

I have a factory installed trailer connector on my 2010 Jeep Commander. How can I determine if its a 4 way connector -vs- a 7 way

asked by: Oz

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Expert Reply:

A 4-way or 7-way trailer connector is labeled as such based on the number of pins it has. The pictures I've attached show the two. You can see the 7-way has 7 pins, 6 of them in a circle pattern and one more in the center. A 4-way has 4 pins straight across.

A 4-way connector controls the trailer's lights; one pin for the left side brake lights and turn signals, one pin fo the right side brake lights and turn signals, one pin for the running lights, and finally a ground pin to complete the circuit. A 7-way has the same functions and ground but also adds a pin for the trailer's electric brakes, reverse lights, and an extra that's just a 12-volt power source for a trailer to maintain a battery or operate its jack or some other accessory from.

expert reply by: Charles S

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Answer 1

For a 2010 Dodge Ram 1500 with a 7-way there is a port under the dash that will be used for the install of a brake controller. The install harness part #3021-P is the harness to use. The plug you are looking for is a white, square connector above the…

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Answer 2

Hey Michael. It sounds like you're going too far back. The Reese Replacement 7-Way RV-Style Trailer Connector item #85219 connects to your factory 7-way right behind the one you have now. You don't need to go all the way back to the square…

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Answer 3

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…

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Answer 4

Hey James yes, the Curt Trailer Hitch Receiver #C13418 does come with the pull wire! If there is anything else I can help you with, please drop a comment and let me know!

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Answer 5

In order to install a 7-Way trailer connector on your 2007 Toyota Tacoma you would first need to install a 4-Way and then hardwire in a 7-Way using #ETBC7. There isn't a plug-in 7-Way available for your truck. For a 4-Way you are correct, they do…

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Answer 6

Curt trailer wiring harness #C56121 does indeed fit your 2011 Lincoln MKX. Installation will be the same as the video I have linked which features a 2013 MKX. We also have Tekonsha harness #118519 or Hopkins harness #HM11140314 which also fit your…

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Answer 7

Yes, the Titan Snow Tire Chains #TC2228CAM will fit many tire sizes including the 265/70-17 tires on your 2015 Toyota 4Runner. These chains include cam tighteners that take up the slack for a proper fit so you do not have to count links. An…

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Answer 8

From the part number and the photos you provided, I am assuming you mean the Titan Snow Chains #TC2228CAM for your 265/60-18 tires on your 2017 Ford F-150. You are correct in determining that these chains will fit your tires. As far as…

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Answer 9

The Plug-and-Play Wiring Harness #RED87FR you were looking at is the correct adapter to install the Redarc Tow Pro Elite #RED44FR in your 2002 Ford F-350. I included a video of the #RED87FR for you to take a look at.

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Answer 10

Since Tow Ready wiring harness #118496 plugs in line with the vehicle tail light wiring you can use it on your 2007 Toyota Tacoma with factory tow package. It is possible that you just have a faulty adapter or that the trailer with the 4-Way…

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Determine Between Factory 4-Way and 7-Way Trailer Connectors

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