7-Way RV Trailer Connector Wiring Diagram

Question

Question:

trailer connector wireing diagram. need to know which color wire go to which post.

asked by: Joann

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Expert Reply:

When wiring a trailer connector, it is best to wire by function, as wire colors can vary. We have an excellent wiring diagram on our website, I will provide you a link so you can look at it.

If you are looking at the inside of the trailer connector where the wires mount to the terminals starting at the top and rotating clockwise:

1:00 is Black and 12 volt power
3:00 is Green and Right Turn and Brake
5:00 is Blue and Brake Controller
7:00 is White and Ground
9:00 is Yellow and Left Turn and Brake
11:00 is Brown and Tail and Running Lights
Center is Purple and is Optional Reverse

I recommend using a circuit tester like part # PTW2993 to verify your connections.

I attached a picture to that shows how the connector should be wired.

expert reply by: Andi

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click to enlarge

Janine M.

2/29/2020

Trailor brakes are locking up. hook up is right. please help. 1990 Fleetwood prowler lynx

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Chris R.

3/2/2020

I would start by testing the brake output pin on your tow vehicle's 7-Way (5 o'clock position) with a circuit tester. See if you only get power there with the manual override activated on the brake controller. If you're getting power at any other time then there's a short somewhere between the controller and 7-Way. You would just need to inspect any wiring you can along the vehicle to check for any exposed, pinched, or otherwise damaged portions that need to be fixed. If the 7-Way tested normal then something is going on with the wiring on the trailer side. Inspect the trailer's 7-Way itself for any corrosion that needs to be cleaned out and then inspect the wiring leading back to the brake assemblies. Let me know what you find and we can go from there.

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Richard

4/4/2020

When I put the turn signal on it flashes all the lights on the trailer also there is no running lights and we have but dont seem like the Brakes on the trailer wont Engage

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Chris R.

4/5/2020

It sounds like you've got a few issues going on. I'd start by testing the 7-Way (or 4-Way if that's what you have) on the tow vehicle with a circuit tester. Make sure you're getting power at all the appropriate pins with the corresponding function activated (turn signals, brake lights, etc). This will tell you where the issue actually is - the vehicle or the trailer. From there inspect your wiring to make sure all the connections are correct and look for any frayed or exposed portions that need to be replaced. Look at the connector itself (both on vehicle and trailer) for any debris or corrosion that needs to be cleaned out. With regards to the actual brake function on the trailer - are you using a brake controller in the vehicle? Let me know what you find and we'll go from there.

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Joe F.

5/3/2020

No power at auxiliary power blade. Any suggestions ?

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Chris R.

5/5/2020

More times then not when the 12V pin on a 7-Way isn't active it's the result of a blown or missing fuse under the hood. Check your vehicle's owner's manual for the fuse locations and make sure the one connected to the 12V trailer circuit is present and in good condition. Let me know if it looks good or replacing it doesn't help.

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Tom

5/13/2020

I think you meant well but your wiring instructions are very confusing. Your instructions state: "If you are looking at the inside of the trailer connector where the wires mount to the terminals starting at the notch at the top and working clockwise". I assume this means looking at the back of the connector where the wires attach, right? So it is the image on the right. Then you say with the notch at the top black 12v power is at 1:00. This is very confusing, the image you include has the notch at the bottom. So if you rotate so notch is at the top then 1:00 per the image is Blue brake controller. Seems like either the image, the notch or your instructions are not consistent.

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Chris R.

5/15/2020

I see what you're saying. I believe Andi was referring to the trailer-side 7-Way with the written locations (the second image). You're right though that this is when looking at the back of the connector (where the wires actually attach).

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Tom

5/15/2020

But the notch is not at the top in the image, it is at the bottom....

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Chris R.

5/19/2020

I see now! I'm really sorry for the confusion. I updated the page to avoid mention of the notch, which is in fact at the bottom when looking at the diagram.

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Don M.

5/20/2020

I have a 2020 3500 chev pk-up with factory brake control & wiring. I have no power to any light pins on 7 wire plug w/tester. However i have 3 trailers 2 work fine 1 don't. All 3 trailers work on 2011 pk_up.

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Chris R.

5/21/2020

If aren't reading any power to the signal light pins on your Silverado's 7-Way, my first thought would be a blown fuse under the hood. Check your owner's manual for the appropriate fuse locations and replace them if needed. I'm not quite sure what you meant by 2 of the trailers working though - are you saying that their lights DO work when hooked up to the Silverado?

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Answer 1

Hey Bob, great question. It was about 7 degrees here in Missouri this morning, so I can relate to the cold. I do have a good solution for this too. What I would do is replace your current 7-way cord with the Curt Cold Weather 7-Way RV Style Connector…

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Answer 2

Hey Larry, we do have the Roadmaster base plate kit part #RM87NQ that is a confirmed fit for your 2025 Ford Maverick Hybrid. Since you have a Blue Ox tow bar you'd also need the adapter part #BX88185.

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Answer 3

Hey Steve, thanks for reaching out! The Roadmaster Direct-Connect Base Plate Kit #RM87NQ fits your 2025 Ford Maverick as long as it's the Hybrid model that doesn't have the engine block heater. It doesn't come with the 6-Pin connector,…

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Answer 4

Hi Adam, The Brophy Stake Pocket Mounted Camper Tie-Downs #TDSF don't technically have a weight capacity, though the turnbuckles they need, the Brophy Basic Turnbuckles w/ Hardware for Camper Tie-Downs #TDHP, have a 3,000 lb weight capacity. So…

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Answer 5

The Bargman 7-Way, RV-Style Connector #WG54006-043 referenced in your question uses the standard RV-style pin locations for its 7-Way connector. I have attached a diagram of these locations and their functions for you to check out. Wire colors will…

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Answer 6

Yes, it does Gary! The Blue Ox Base Plate Kit item #BX2914 has been confirmed to fit the 2025 Ford Maverick hybrid. I have linked a installation video below along with the instructions so you can see how to get it set up. If you have any additional…

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Answer 7

A junction box/7-way plug kit like Epicord #277-000141 or #HS381-9000 lets you convert the camper to match the 7-way RV blade type connector format. This avoids the extra connection points and potential trouble spots from using separate adapters.…

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Answer 8

Hey Steve, thanks for reaching out again! Hopkins doesn't have any exceptions for their Wiring Kit #HM39VR which normally means it's compatible, but even though this is easier to install than a lot of the other options, from my experience I…

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Answer 9

Hi Russ; you pretty much have everything you need right there with the exception of a few parts. I'm going to go ahead and list it all out here with links to make it easy for your to manage. You will need the following: -etrailer Invisible Base…

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Answer 10

Yes, it will! You'll want to cut off the 4-way connector of the Curt Custom Tail Light Wiring Kit for Towed Vehicles item #C96JR and install the 6-way connector that comes with the Curt Tow Bar 7-Way to 6-Way Coiled Adapter Cord w/ 6-Way Socket…

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Answer 11

I have added a photo detailing the wiring connections for the Pollack Heavy-Duty, 7-Pole, Round Pin conncetor, #PK11700, see link. This is a SAE J560 compliant connector. The wiring diagram for the vehicle side connector, #PK11720, is pictured also.…

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Answer 12

Your 4-pin/5-wire wiring harness is what is called a "wishbone" type which simply means that there are two separate running light wires, one brown and one pink. This allows a separate running light wire for each side of the trailer which…

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