How To Wire In a 7-way to Replace a Boat Trailer 5-Way Flat

Question

Question:

I have a 5-way flat with 7 wires going into it White, Brown, Brown, Yellow, Green, Red, Red on my boat trailer with brakes. I would like to replace the 5-way flat with a 7-way plug to fit directly to my vehicle without having to use an adapter. My question is, can I use this plug H20046? And if so, how do I connect my current wires to the new 7-way plug? Im confused with what to do with my 2 red wires and 2 brown wires. Also, do I even use the black power wire coming from the 7-way? Thanks for your help!

asked by: Joe

0

Expert Reply:

You definitely could install the 7-Way Molded Trailer Wire Connector # H20046 in place of the 5-way that is installed on your trailer currently. The colors wouldn't match up exactly. White would go to white, you would run both brown wires to the single green wire of the 7-way. Yellow of your trailer would go to the red wire of the 7-way, and green of the trailer wiring would go to brown of the 7-way.

Now without knowing where the red wires of the 5-way go it's hard to say for certain. You will need to trace them back and see where they go. If they are brakes (most likely not) you would run both wires to the blue wire of the 7-way. If it's for a 12 volt power you would want the black wire of the 7-way. If it's any other circuit it would run to the yellow wire.

Check out the chart I attached as well.

expert reply by: Jameson C

0

click to enlarge

Answer 1

If your 2023 Toyota Tacoma doesn't have any trailer wiring you would first need to start with a 4-way like the part #C56349 which is a confirmed fit and then install a 4-way to 5-way kit like the part #C57187 which would run to your reverse light…

view full answer...

Answer 2

The Buyers Products Hour Meter part #337B40B45 can be wired to any 10-80 VDC accessory that you need to monitor the run time on. It is primarily used for equipment maintenance and repair schedules. It will simply install inline on a power wire that…

view full answer...

Answer 3

I've linked a help article that will give you the common color coding but on your trailer I wouldn't go by it. Even if they are correct you just never know so I suggest testing it. To test it cut off the 5-way connector that's on there…

view full answer...

Answer 4

What you have is a 5-way trailer connector with a wishbone running light circuit and 5th auxiliary circuit. The closest thing we have would be the Wishbone 5-way Part #A25W5B. This has a wishboned running light circuit, but the 5th circuit is not.…

view full answer...

Answer 5

What you have is a 5-way with a double wishbone, which means it is likely a double wire for marker lights as well as a double ground. You can replace your 5-way with another wishbone-style but it does not need to be a double wishbone with 7 wires,…

view full answer...

Answer 6

It's possible. Here's Cargo Towing Solutions troubleshooting procedure for if the actuator won't run, or runs continuously: Verify that the trailer and tow vehicle are wired according to the electrical schematic shown below. Perform the…

view full answer...

Answer 7

The closest match would be #STL211RB. It doesn't have a clear lens or Glo feature though. The grommet for this light is #A70GB and you would need pigtails #A47PB and #A49PB to plug into the back of it.

view full answer...

Answer 8

The CAM from the Carlisle Control Adapter Module #HBA-CAM stands for Control Adapter Module. The purpose of this unit is to adapt the Carlisle HydraStar Electric-Hydraulic Actuator #HBA16 to the following brake controllers. Ford factory controller…

view full answer...

Answer 9

I would be happy to help you set up your 2022 Toyota Highlander to haul your new travel trailer. The wiring harness you currently have controls your trailer's lighting functions only. You do not need to rewire your Toyota you just need another…

view full answer...

Answer 10

On the 7-way wiring plug and lead part #H20046 there isn't a purple wire. Normally a purple wire for a 7-way is for a reverse light circuit. Which would correspond to the yellow wire of this adapter.

view full answer...

Answer 11

There's not a universal way that trailers are wired. I have attached a diagram showing the three typical ways and this should also help you to connect to the 7-way harness you purchased once you identify your wires. Yours is obviously different,…

view full answer...

Answer 12

For a new 7-way plug the part #H20046 is an 8 foot long plug that would work well. This is a 7-way RV style plug. I attached an install video for this plug for you to check out.

view full answer...