How To Install a Flat-Tow Wiring Harness on a 2005 Jeep Wrangler with Trailer Wiring Harness

Question

Question:

I will be pulling my 2005 Jeep Wrangler with a 2008 Chevy Trailblazer for short trips. On my Jeep, it has a rear tow hitch wiring for a trailer and I want to keep it. I have LED headlights with built in turn signals, they are on the upper and lower of the headlights. I want to know if any of this will be a problem? Thanks for any advice.

asked by: Richard A

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Expert Reply:

I do have options for you but it's largely going to depend on what trailer wiring harness you have installed on your 2005 Jeep Wrangler. The best and most simple solution for you would be to just use a set of magnetic tow lights, the MaxxTow Magnetic Tow Lights part # C6304. However, we do have hardwire options for you as well.

If you have a factory trailer wiring harness then you can use the Hopkins Custom Tail Light Wiring Kit for Towed Vehicles part # HM56202 which is a plug and play option. If you have an aftermarket trailer wiring harness then you will want to use the Tow Ready Tail Light Isolating Diode System with 4-Pole Connector part # TR118821 and splice into the vehicle's tail lights before the aftermarket trailer wiring harness.

If you don't know what trailer wiring harness you have then you can use the Roadmaster Tail Light Wiring Kit with Bulbs part # RM-155 instead. The flat-tow trailer wiring harnesses do not splice into the head lights so yours should not be an issue.

expert reply by: Conner L

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Answer 1

According to Curt Manufacturing, their #C56407 trailer wiring harness is compatible with all models of the 2021 Jeep Wrangler Unlimited, so it'll work just fine for you. If you click the provided link, you can see an install video that you…

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Answer 2

The Curt Echo Mobile Trailer Brake Controller - Wireless part #C51180 is the brake controller so you do not need a brake controller to use the Curt Echo. I can see why someone would think that though considering the Echo is so simplistic it seems…

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Answer 3

The 7-Way RV Upgrade Kit for Trailer Brake Controller Installation part #ETBC7L is for wireless trailer brake controllers like the Curt Echo Wireless Trailer Brake Controller part #C51180. It does not contain a physical stop light switch…

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Answer 4

You can use the Curt Echo Mobile Brake Controller part #C51180 on a vehicle that has a 4-way but you'd need to convert it to a 7-way with the part #ETBC7L for it to function properly. Basically your 4-way would plug into the 4-way of the…

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Answer 5

I have attached a photo of a typical 4-way round connector with the pins labeled you can check out. The photo has both the trailer side and vehicle connectors labeled.

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Answer 6

The psi of your trailer tires will be listed on the side wall. It will list the max psi which is what you will want to fill them to regardless of how much weight you have. For reference, the 4.80 x 12 tires we carry have a 60 psi max for load range…

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Answer 7

In order for the #C6304 to function you would need to make sure that the batteries are installed properly in the light kit as well as make sure the power switch is turned on. This switch is at the bottom of one of the lights in a recessed opening.…

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Answer 8

The Hopkins LED Magnetic Tow Lights #C6304 will provide running light, turn signal and brake light functions, all of which are supported by their 4-pole flat type wiring scheme. Running light signals are carried on the brown wire in 4-pole wiring. If…

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Answer 9

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 10

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 11

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 12

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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