Where Does Blue Wire Go on 4 to 7-Way Adapter With Curt Echo Wireless Trailer Brake Controller

Question

Question:

I have a 2020 Sienna LE and have a 7way 4 way combo plug and 4 way wiring installed. All wires are connected incl. auxiliary power except the blue one for EB. I want to use the Curt Echo wireless controller. Where do I connect the blue wire to?

asked by: Bert S

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Expert Reply:

The trailer brake output or blue wire is not connected on a 4 to 7-way adapter like the 4 to 7-Way with 4-Way Adapter part # ETBC7L when using a wireless trailer brake controller like the Curt Echo Wireless Brake Controller part # C51180. The two four way plugs connect to each other, the white wire goes to ground, the black wire goes to the vehicle battery, and the yellow and blue wires get tied up. The blue wire is not used like it would be for a traditional trailer brake controllers as there is nothing in the cab to connect it to since the controller is now plugged into the trailer connector. The brake controller uses the black wire for power and it then sends this power through the blue wire on the trailer to the magnets.

expert reply by: Conner L

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Answer 1

Hello Scott. The #ETBC7L kit is exactly what you need to upgrade your 4-flat to a 7-way and use the Curt Echo Controller. Since you have a boat trailer with a reverse lockout, you will need to locate the reverse light circuit on your vehicle. I do…

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Answer 2

If you have a vehicle specific wiring harness for a brake controller then that would indicate that you have a factory tow package and subsequently would already have a 7-way at the back of your vehicle. The universal 7-way connector #ETBC7 is meant…

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Answer 3

Hey Albert, yeah finding the reverse light circuit on a vehicle can be somewhat challenging but I have some tips that will hopefully be helpful. So first thing to do is remove the interior panels on the rear hatch where the reverse lights are like…

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Answer 4

When installing the #ETBC7L on your 2021 Toyota RAV4 you don't have to make the connection to the reverse light circuit or auxiliary power circuit with the yellow wire if you don't want to. If you want to splice into the reverse light circuit…

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Answer 5

We actually have a version of the #ETBC7 that we put together specifically with the Curt Echo Mobile brake controller part #C51180 in mind with the #ETBC7L which comes with just the components needed for the Echo. The ETBC7 comes with the same…

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Answer 6

I would be happy to help! The 4-way connector #TK69FR you purchased for your 2021 Toyota Sienna cannot have a reverse light circuit, as it does not have enough circuits in the connector for a 5th function. Instead the #ETBC7L 7-way connector you…

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Answer 7

The wiring that comes with the 7-Way RV Upgrade Kit #ETBC7L is only meant to carry the 12V power for 1 function. Since you're wanting 12V power from your vehicle battery to go to 2 functions you need the Universal Installation Kit #ETBC7 instead.…

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Answer 8

Most trailer hitch balls have a flat part on two sides of the base like the 2" Hitch Ball - 1-1/4" Diameter x 2-5/8" Long Shank - Chrome - 10,000 #A-90 for example. You will simply need a open end wrench large enough to fit that. Vise…

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Answer 9

Yes, the Curt Trailer Hitch Receiver #C13105 is a custom fit receiver for your 2015 Toyota Sienna SE. This receiver is rated for a trailer weighing up to 3,500lbs with 350lbs of tongue weight or 5,000lbs and 500lbs of tongue weight if using a weight…

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Answer 10

The most common type of trailer connector for a 2022 Toyota Sienna would be either a 4-pole or 7-way. There are only 4-pole options for this vehicle, the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part #TK69FR is what I…

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Answer 11

Hey Michael, the 7-way kit that is going to make the most sense for your 2021 Toyota Sienna is going to be the #ETBC7 that comes with everything needed to convert a 4-way to a 7-way and wire up the needed circuit for your RF controller.

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Answer 12

It sure does! I verified with the manufacturer for you that the Draw-Tite hitch for your 2022 Toyota Sienna does indeed fit the hybrid models; the correct part number is the following: - Draw-Tite Max-Frame Trailer Hitch Receiver #DT55MR If you also…

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Where Does Blue Wire Go on 4 to 7-Way Adapter With Curt Echo Wireless Trailer Brake Controller

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