Recommended 4-Way and 7-Way Wiring Harness for 2021 Jeep Grand Cherokee L

Question

Question:

I intend to use a trailer brake controller and a trailer with brakes on 2 axles, would this still be the best wiring harness for me or would you suggest something else?

asked by: Phil

1

Helpful Expert Reply:

For 4-way wiring, the Tekonsha T-One Vehicle Wiring Harness # TK39VR is the best option for your 2021 Jeep Grand Cherokee L. In order to be able to use your brake controller, you will also need to add a 7-way connection once you have installed the 4-way.

For a 7-way, I recommend the Universal Installation Kit # ETBC7. This kit comes with everything you need to upgrade your 4-way to a 7-way. The included adapter has both a 4-way and 7-way connection so you will still be able to use both depending on your needs.

If you need a brake controller as well, I recommend the Redarc Tow-Pro Liberty Brake Controller # RED24FR along with the # RED69FR wiring harness. This proportional brake controller will work on trailers with up to 2 axles. The main unit installs out of sight and the control knob mounts wherever you want in the dash. I like this brake controller because it doesn't take up any space inside your vehicle and the control knob is simple and easy to use.

I have attached some review videos for your reference. We do not have an installation video for the # ETBC7 on the Grand Cherokee L, but I included one on another SUV so you can see what the process is like.

expert reply by: Robin H

1

Phil

11/14/2021

I have all this installed, but I’m struggling to find a cold brake switch wire to connect to the Red signal wire on the Redarc brake controller. I do not have the factory towing harness to plug into, any guidance on where to get the brake signal from?

Reply

Les D.

11/18/2021

@Phil Please provide me the year/make/model of your vehicle, plus the brand and model of Redarc brake controller you have, and I will try to locate that information for you.

Reply

Answer 1

Yes, we do indeed have a trailer hitch receiver that fits your 2021 Jeep Grand Cherokee L. The hitch is from Curt with the correct part number being the following: - Curt Trailer Hitch Receiver #C96NR If you plan on towing and also need a 4-flat…

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Answer 2

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…

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Answer 3

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…

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Answer 4

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 5

I spoke with Curt about the Curt Trailer Hitch Receivers for a 2022 Jeep Grand Cherokee L, part #C97JR and part #C96NR. The latter is an updated design which was done to offer more fit options. That said, I simply recommend going with whichever…

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Answer 6

Yes, the Curt Trailer Hitch Receiver #C97JR will fit your 2023 Jeep Grand Cherokee L. The hitch installs behind the rear bumper and the receiver will sit in the factory cutout. When the hitch bumper cover is in place the hitch will be completely…

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Answer 7

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 8

Yes, we do. To add a hitch to your 2024 Toyota Grand Highlander, I recommend the Curt Trailer Hitch item #C26VV. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a 2" receiver. It has a…

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Answer 9

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

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Answer 10

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

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Answer 11

Yep, so long as your 2024 Subaru Crosstrek Wilderness is not a hybrid both the Curt and etrailer hitches will fit: - Curt Trailer Hitch Receiver #C13382 - etrailer Trailer Hitch Receiver #e98912 The only difference besides price is the finish; the…

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Answer 12

Class I and Class II hitches both have a 1-1/4 inch receiver opening. The difference is that a Class I hitch has a lower tongue weight rating, usually 200 pounds and a lower towing rating, usually 2,000 pounds. A Class II hitch usually has a tongue…

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