What Trailer Wiring Do I Need on My 2021 Jeep Grand Cherokee (Without Factory Tow Package)?

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For setting up your 2021 Jeep Grand Cherokee (without factory tow package) for wiring, you will first need a 4-way harness. For a 4-way that is compatible with your vehicle, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C62VR. The Curt connector will allow you to install a 7-way into your vehicle for the functions you need for towing if you need those functions.

For a 7-way, once you have the 4-way installed, you need the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat # ETBC7. This will give you the ability to hook up all of your trailer's tail light functions as well as add a brake controller. If you need help with installing the # ETBC7 with the for your vehicle's brake controller, I went ahead and attached the wiring diagram to this answer.

As far as a brake controller, I recommend the Curt TriFlex Trailer Brake Controller # C24VV with the Universal Wiring Adapter for Curt Controllers # C51515. The TriFlex will give you proportional brake control which means the controller will activate in proportion to your vehicle's braking action. It also comes with continuous diagnostic checks.

If you want a fancier wireless option, I recommend the Curt Echo # C51180. Like the TriFlex, the Echo also includes a proportional braking system. What sets the Echo apart from the competition is the ease of installation. You will be able to avoid complicated wiring and bulky control units in your vehicle.

I went ahead and attached videos of the installation process of the TriFlex and the Echo to this answer.

expert reply by: Bob C

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# ETBC7 Wiring Diagram with Brake Controller
(click to enlarge)

Answer 1

It is possible that the Curt 4-way connector like the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector #C62VR can short out. This is usually caused by a short in the trailer wiring. You can test your harness by using a…

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Answer 2

The Curt T-Connector Vehicle Wiring Harness #C62VR will plug in line of the factory wiring harness on your 2021 Jeep Grand Cherokee. I have included a picture of the drivers side connections. The female connector from the Cherokee will plug into the…

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Answer 3

I suspect your problem is caused by a damaged or corroded trailer connector. Take a look at your trailer connectors, both the socket on your truck as well as the plug on the trailer. Look for green or white corrosion on the pins or sockets of the…

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Answer 4

There are a host of potential problems if the running lights on your trailer stay on after installing the Curt #C62VR, so troubleshooting them is going to be a process of elimination. The first thing to do would be double-check the ground connections…

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Answer 5

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 6

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 7

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…

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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

To add a hitch to your 2024 Toyota RAV4, I recommend the etrailer item #e23ZR. 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 4,000 lbs towing capacity, and a 600…

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Answer 10

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…

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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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What Trailer Wiring Do I Need on My 2021 Jeep Grand Cherokee (Without Factory Tow Package)?

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