Can the Trailer Connector for the Curt Wiring Harness On a 2018 Ram ProMaster Be Routed Outside

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Question:

Im curious about the aftermarket vs. OEM wiring options. Both seem similar that you have to run the power wire to the battery. I like how the OEM allows you to mount on the outside. Do all of your options have to go through the door? I was told by the dealer that the PCM may need to be flashed since mine didnt come with the tow package. Is this true? I know there is no tow/haul buttons in these vans. Is the PCM flash necessary to change shift points, braking, etc. when it sees the trailer plugged in?

asked by: Joseph M

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Expert Reply:

The Curt T-Connector Vehicle Wiring Harness part # C56270 which is a fit for a 2018 Ram ProMaster City can be installed so that the trailer connector is stored outside of the vehicle. In order to do so you will simply need to route the trailer connector through a grommet in the floor outside to the rear bumper. I don't have exact instructions on this but essentially you just need to peel up the carpet/panels near the rear bay access doors and then look for a grommet you can use to route the trailer connector outside.

In regards to programming, there will be none required for the Curt T-Connector Vehicle Wiring Harness but I can't speak for the OEM trailer wiring harness. That said, the programming you are referencing wouldn't change shift points or adjust any vehicle parameters, just turn circuits on for the trailer lights.

The only other thing you would need with the Curt T-Connector Vehicle Wiring Harness to install the connector outside the vehicle is a way to secure the connector. The No-Drill Mount part # 18140 and the Mounting Bracket 4-Pole Flat part # 18144 would have you covered.

expert reply by: Conner L

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Answer 1

The best way to add a 5-Way connector to your 2016 Jeep Wrangler is by using the Tow Ready Adapter #20036. This plugs into an existing 4-Way on your vehicle, like the T-One #118416, for the basic trailer light functions, and then you splice in the…

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Answer 2

I do have an option for you but there are only 4 and 7-way trailer wiring harness options for a 2015 Jeep Wrangler Unlimited, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part #118416 for a 4-way. This can then be…

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Answer 3

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 4

There are a couple of differences between the wiring harnesses for your 2016 Ram ProMaster. The biggest difference is the technology used. The Curt #C56270 uses what is called Surface-Mount Technology. Essentially what this does is almost eliminate…

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Answer 5

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 6

You're pretty much right on, the Draw-Tite Max-Frame Trailer Hitch Receiver #75219, the etrailer Trailer Hitch Receiver #e96YR, and the Curt Trailer Hitch Receiver #C13215 are pretty much the same. The only differences are going to be the brand,…

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Answer 7

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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Can the Trailer Connector for the Curt Wiring Harness On a 2018 Ram ProMaster Be Routed Outside

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