What is Best Way to Make Trailer Wiring Connection

Question

Question:

I have a continuous 10gauge wire between the wheels with electric brakes. I want to tap into that wire and run a single 10 gauge wire to my 7 blade trailer side connector. Ground wires are grounded to frame at the wheels. Question: what’s the best type of connection /splice to tap into the cross wire connecting both wheels? I could cut and use a big wire nut to Ty all three together- probably a better way? Thanks,

asked by: Larry G

0

Expert Reply:

Hey Larry, the best connection you can make is to solder the connections instead of trying to use a butt end or twist connector. Nothing is more secure that soldered wire connections and since it's trailer brakes where safety is a factor I would strongly recommend soldering.

We have a cordless soldering iron with part # PTW2000 as well.

expert reply by: Jameson C

0

Jameson C.

10/27/2025

Hey Larry, how did the soldered connection work out for your trailer brake wiring? Your results could really help others deciding between soldering and other splice methods. Sharing what you found might guide the next person tackling the same setup.

Answer 1

The wire that comes with the 7-Way RV Upgrade Kit for Trailer Brake Controller Installation #ETBC7L for the power circuit for the Echo #C51180 is 12 gauge. I would agree that 10 gauge would probably be more ideal for carrying a brake output circuit.

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Answer 2

Since your plan is to use the Curt Echo part #C51180 the 4-way to 7-way adapter you need is the part #ETBC7L which was made with the Echo in mind. It comes with the correct size breakers and wire gauge that the controller needs which happens to be 12…

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Answer 3

To install the Curt Echo Mobile #C51180 on your vehicle using the 7-way adapter part #ETBC7L will require you to just run the black wire up to the vehicle battery with the included 12 gauge wire and breaker. We had the chance to install this kit on a…

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Answer 4

Since you already have the #37185 adapter, all you'll need to do to install the Curt #C51180 Echo wireless is run a 12V circuit from the black wire on the adapter to the positive battery terminal via a 30 amp circuit breaker like #PK54530.…

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Answer 5

Hey Larry, the Curt Echo #C51180 does not need the blue wire circuit to be completed at all on the vehicle side as it basically provides that circuit. It does need to have the 12 volt power circuit active though so you would need to have the pin in…

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Answer 6

You need to run the power wire of the #ETBC7L kit and of the trailer wiring kit part #118599 separately as they at any given moment you could over draw the wire if both circuits were pulling their max amperage.

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Answer 7

You'd want to use 10 gauge wire like part #10-1-1 which we sell by the foot. Attaching to the battery is a matter of going directly to the positive post of the battery and you'd be set.

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Answer 8

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 9

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 10

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 11

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 12

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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What is Best Way to Make Trailer Wiring Connection

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