Recommended 5-Way Adapter for Vehicle 4-Way Trailer Connector Wiring Harness to Work With Trailer

Question

Question:

My wiring on my trailer is 4 way but it has 5 wire how do I connect it to a 4 way with 4 wire. Color wire is white,brown,yellow/brown,yellow,green.

asked by: Jerry

0

Expert Reply:

For your trailer with 5-way flat connector to connect to your vehicle 4-way flat, I recommend the Curt Trailer Connector Adapter - 4-Way Flat to 5-Way Flat - Vehicle End # C57187 or the Tow Ready # 20036. The blue wire will connect to your reverse light wire at your tail light utilizing the quick connect supplied with this adapter.

expert reply by: Jason S

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Jerry

12/8/2017

My wiring on my trailer is 4 way but it has 5 wire how do I connect it to a 4 way with 4 wire. Color wire is white,brown,yellow/brown,yellow,green.

Reply

Jason S.

12/8/2017

It is likely that the brown and yellow brown are both running light circuits with one run to each side of the trailer. They call this a wishbone harness like # A35W42B because it makes that running light wire split at the connector instead of running a jump wire from one side of the trailer frame to the other at the light location. Check the functions using a battery to isolate function and location to confirm because the colors aren't a perfect match. I've attached an article to assist. If this is the case, you can simply splice the 5 wires into a 4 wire connector like the Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector - Trailer End - Jacketed - 48" # HM38134. If that 5th wire on your trailer activates a reverse light, then you have a 5-way and will need to add the adapter # 20036.

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Answer 1

The most common connectors on boat trailers are the 4-way and 5-way flat connectors. The 5-way flat connector is easy to identify as it looks just like the 4-way connector but will have one extra pin. If your trailer has a 5-Way flat connector you…

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Answer 2

You just need this adapter #C57187. The blue wire will tie into a wire on your 2017 Tacoma and then snap into the blue wire with the connection point. I have a video to help explain more!

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Answer 3

The manual lockout on your Atwood 85778 surge brake coupler is there so that you can back up the trailer without the brakes locking up on you. Yes you can safely tow your trailer with the broken manual lockout, you just have to make sure you…

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Answer 4

I would love to help you upgrade the suspension on your Twilight 2800 travel trailer. The MORryde Rubber Equalizers for Tandem Axle Trailers #MR87ZR that you referenced are a great solution but we do need to double check a few things. First is that…

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Answer 5

The only way you could power interior dome lights on a trailer without it being connected to a tow vehicle would be to power the lights with a battery like a breakaway battery. How you choose to wire up the batteries will in the end be up to you, but…

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Answer 6

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 7

The UFP H-1377 correlates to a Dexter #84 spindle, which is for a 3,500 pound axle. This will utilize an inner bearing #L68149 and an outer bearing #L44649. As this is being used on a boat trailer, I highly suggest going with the etrailer.com…

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Answer 8

The ALKO 4,400 lb axles use the same bearing sizes as the standard 3,500 lb alxes. If you want USA made bearings, I recommend the Bearing Kit #TMK52VR. This kit comes with the Timken brand bearings which are all made here in the USA.

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Recommended 5-Way Adapter for Vehicle 4-Way Trailer Connector Wiring Harness to Work With Trailer

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