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

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 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

The towing capacity of the bumper on your 2014 Toyota Tacoma assuming you have the cutout will vary from 3,300 - 3,500 lbs depending on options. I advise you to take a look starting at page 228 of your owner's manual to see these options.…

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Answer 4

The factory harness to plug in a brake controller wiring harness on your 2007 Toyota Tacoma is located underneath and left of the steering column, taped to another harness near the emergency brake pedal. There will be a 5-pin connector that mates…

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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

The Curt TriFlex Trailer Brake Controller part #C24VV is an excellent option for a 2008 Chevrolet Silverado when used with the Universal Wiring Adapter for Curt Trailer Brake Controllers part #C51515. The wires under the dash are already ran and…

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Answer 7

You're right, the mounting bracket is unique (in a good way) for the Curt TriFlex NEXT Trailer Brake Controller #C24VV. The bracket is smaller and all you do is put the included adhesive tape on the bracket and stick it wherever you like under…

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Answer 8

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

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