Is There a Way to Install Brake Controller on Second Trailer of Double Tow Setup

Question

Question:

Im double towing a 16foot enclosed trailer with SxS inside it has has trailer brakes and i already have a flat 4 at back of 5th wheel from towing a small utility trailer. Can I use the flat 4 to power a 2nd brake controller inside enclosed trailer then install female 7 pin from controller for brakes and lights?

asked by: Scott L

0

Expert Reply:

Hey Scott, double towing gets a little tricky but what I would probably do is use a wireless brake controller like the Curt Echo Mobile # C51180 on the second trailer as that would be the only reasonable way to activate a second controller since the needed circuits aren't there for a standard controller. You'd need to install a 7-way like the part # 37185 at the rear of the first trailer and you'd need to have all of the stop/turn circuits ran to it, ground and 12 volt power and then once synced to your smart phone you'd be able to control it.

expert reply by: Jameson C

0

Jameson C.

12/29/2025

Hey Scott, how did things go with the Curt Echo wireless brake controller on your second trailer? Your update could make it easier for others figuring out double towing setups like yours.

Answer 1

Hi Jeff; the Dutton-Lainson Boat Trailer Jack w/ Wheel #DL22339 is designed to fit a 3" tall x 4" wide trailer tongue. It is possible to use it with a 5" wide trailer tongue but you will likely need to acquire longer bolts locally to…

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Answer 2

The Dutton-Lainson Square Swivel Jack #DL22340 has a mounting plate designed to fit trailer frames with a height of 3" - 5". I have attached a dimensional drawing below with all of the bolt spacing for your reference.

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Answer 3

Hello again, Alex. Both the Dutton-Lainson #DL22457 and Fulton F2 part #F1413140334 are good jacks but between those two the Fulton F2 is the better quality option as far as quality, durability and serviceability. The Fulton F2 is made of a coated…

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Answer 4

I attached a picture that has the measurements of the mounting holes on the mounting plate of the Dutton Lainson Sidewind jack #DL22339 that you referenced. Basically they are 5-1/2 inches from left to right and then 2-3/8 top to bottom row and then…

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Answer 5

The Fulton F2 Swing-Up Trailer Jack with No Mounting Hardware #F1413100334 referenced in your question features a bolt pattern that is 3-3/8 inches on center x 4-3/8 inches on center. There is not a Fulton jack currently available that includes a…

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Answer 6

I do have an option, but the Dutton Lainson Square Swivel Jack #DL22340 you were looking at will not bolt directly to the welded mount on your trailer that your current Fulton F2 trailer jack is bolted to. With that being said as long as your trailer…

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Answer 7

The Dutton Lainson jack part #DL22340 has a wider bracket than the what a Fulton F2 jack would have so you'd have to remove the Fulton bracket so you could install this jack in it's place.

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Answer 8

I think in an absolutely ideal world you'd have two brake controllers so that you could set the max braking pressure individually but in reality that would be really involved to pull off and you'd get solid results with just a single brake…

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Answer 9

The Prodigy RF brake controller part #TK94FR requires being connected to a 7-way trailer connector that has taillight circuits that are combined on the brake lights and turn signals. As well as has to have a 12 volt power circuit that is active too.…

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Answer 10

In order to use the Tekonsha Prodigy RF Wireless Trailer Brake Controller part #TK94FR on a vehicle with another brake controller already installed all you need to do is unplug the connector from the back of the other brake controller. You will not…

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Answer 11

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 12

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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Is There a Way to Install Brake Controller on Second Trailer of Double Tow Setup

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