Solution for Connecting Vehicle With 4-Way Flat to Trailer With 4-Way Round

Question

Question:

I have a 4pole round connector on my trailer and need an adapter to fit the 4flat on my vehicle. Thanks.

asked by: Ed

0

Expert Reply:

There are adapters that go from a 4-round on a vehicle to a 4-flat on a trailer but not vice-versa, but we do have a simple solution for you.

All you need to do is cut off your trailer's 4-round and wire in a trailer-side 4-flat, the Wesbar 4-Pole Flat Connector - 4' Long # W787264 or 8' Long # W787268.

To install either you just need the Butt Connectors # 05731-5.

I've added a link to an install video for you to check out as well.

expert reply by: Kyle S

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Answer 1

The Roadmaster Brite-Lite Wiring Converter #RM-732 that you referenced will work the same as your existing Curt unit in that it will convert a 3 wire system on a towing vehicle to a 2-wire system on the towed vehicle or trailer. It won't…

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Answer 2

The Roadmaster Extension Loop for Towed Vehicles - Dual 4-Way Flat Trailer Ends - 6' Long item #RM-300150-00 uses 18 gauge wires.

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Answer 3

Since we don't have the exact 4-way adapter you are looking for the best option would be to use two of the #9653P connectors and cut them both in half and then splice the two male sides together.

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Answer 4

What you need is a converter to take the separate turn and brake light circuits and combine them. You will need converter #RM-732. It will take the separate signals and combine them so on the output side you have a green wire for right turn and brake…

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Answer 5

Diodes are only for situations where you are using the towed vehicles factory tail lights and wires. When using the Roadmaster Tail Light Wiring Kit, #RM-155, it provides dedicated tail lights and wires so diodes are not needed. I have attached a…

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Answer 6

We do have 4-Way flat to 4-Way flat extension adapters available, however they do not feature a coiled wire like you mentioned in your question. I recommend taking a look at the Hopkins 4-Pole Flat Wiring Extension #HM48235. This extension measures…

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Answer 7

We normally recommend the converter #RM-732 to convert a separate turn signal circuit setup to a combined. This would work well for you and be what we would recommend. We haven't had any issues with voltage on this converter damaging anything.

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Answer 8

Yes, the Roadmaster Brite-Lite Converter, #RM-732, will help convert the 3 wire signal from your motor home to the two wire signal to you flat towed vehicle. The Brite-Lite converter can also increase the light intensity of your turn and brake…

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Answer 9

Without seeing how everything is wired, it is a bit hard to diagnose, but I am guessing you have 1 too many wires run to the Brite-Lite Converter. The ground that is on part #RM-732 should be grounded to the motor home frame or structure. The GND…

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Answer 10

The Hopkins part #HM48235 has 16 gauge for wires. For a 4-way that has all 16 gauge wire you would want the Wesbar 4-Pole Flat Connector #W787264.

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Answer 11

A 4-way with seven wires has two wires for each side of the taillight circuit, and you can use a standard 4-way, like you mentioned, the Wesbar 4-Pole Flat Connector #W787264. I have added a link below to a video review for you to take a look at, as…

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Answer 12

You will need the Roadmaster Brite-Lite Wiring Converter item #RM-732. The Brite-Lite converts a 3 wire electrical system on a towing vehicle to a 2-wire system on the towed vehicle.

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