Hopkins 7-Way RV Style Connector with Molded Cable - Trailer End - 8' Long - RV Standard

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• What are Two Standard 7-Way Wiring Color Diagrams
  For trailer 7-ways there are two wiring color standards that are commonly seen. I attached a picture that shows the difference. Typically red and black are not interchanged though. Sometimes red and yellow are for left turn/stop signal. That said not all people will use standard trailer wiring colors so you might have non standard colors used.
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• What is the Function of the Yellow/Brown Wire on a Trailer
  Your yellow/brown wire most likely ties into the brown running light wire. Typically, when a trailer has a green/brown wire and a yellow/brown wire, they are both used for the running light circuit. The green/brown wire is ran down the right side of the trailer and the yellow/brown wire is ran down the left side of the trailer for the tail lights and marker lights. This prevents the need from running jumper wires across the trailer for the running lights. If your trailer is setup this way,...
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• Identifying Trailer Wire Colors and Troubleshooting Trailer Wiring Not Functioning
  I can help you identify the wire functions of the kit you have. The yellow wire is left turn/stop, the green is right turn/stop, the yellow and brown is left side running light circuit and the brown and green is right side running light circuit. You didn't mention a white wire though which is a very important circuit. That is the ground circuit and without it being connected to a clean metal surface on the trailer frame none of the circuits will function.
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• Trouble Shooting a Malfunctioning Wiring Harness on a 2017 Ram 2500
  I recommend you check to see if your harness is grounded correctly and all fuses are good on your 2017 Ram 2500. You should also test the running lights pin on the truck side 7-Way connector while the lights are turned on in your Ram 2500.
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• How To Wire In a 7-way to Replace a Boat Trailer 5-Way Flat
  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....
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• Mounting Two Trailer Stop, Turn and Marker Lights on Each Side of a Trailer
  If you are using two stop/turn/marker lights on each side of the trailer, the only signal you will be able to separate out is the taillight signal. Trailers in the United States use a combined stop and turn signal so you would not be able to separate them to wire one light turn and marker and the other light brake and marker or brake turn and marker. You would essentially have two options. One light on each side stop/turn/tail and the other taillight only, or one light stop/turn only and...
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• How to Test the Functions of Trailer Tail Light Circuits
  The easiest way to test the functions of the taillight wiring on a trailer is to use a jumper wire. You will touch one end of the jumper wire to the positive post of a 12 volt vehicle battery and then touch the other end of the wire to all of the different wires to see what circuits illuminate. The other option would be to trace the wires back to see where they terminate.
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• Troubleshooting Running Lights Not Working on New 5th Wheel Trailer With Headlights On
  When the headlights being switched on cause other lighting functions to quit working we have found this to either be the result of a bad ground or too many lights on the trailer. Since it sounds like you have had a normal towing experience until recently it is probably a bad ground. Start off by verifying that both your tow vehicle and 5th wheel trailer connectors are clean and free of any corrosion or debris. Once those are clean we can move on to finding the issue with the ground but...
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• Will Trailer Lighting Circuit Still Work with 7-Way if Brake Controller isn't Used
  Yes, the lighting functions of a trailer 7-way will be fully functional regardless of if a brake controller is installed/functional. The circuits are totally separate. There are many people who use 7-way trailer wiring setups without a brake controller and lighting all works fine.
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• Where Does Yellow Wire of Trailer Wiring Connect to on 7-Way Wiring
  I attached a picture for you to use as a guide for wiring in your trailer's 4-way wiring to a 7-way socket connector. The yellow wire is the left turn/stop circuit that you have out of the connector.
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• Help Determining Wire Colors of Trailer Wiring for Installing New 7-Way
  Most likely some of the colors of the wires in your picture would match up to the # H20046 your best option would be to take a jumper wire from a 12 volt vehicle battery and put voltage on each wire to determine it's function and then wire accordingly. I attached a chart that has the wire color functions listed for this connector for you to check out as well.
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• Wiring a 7-Way to a Trailer with a 6-Way that Uses Non Standard Colors
  Unfortunately not all trailer manufacturers will use a standard wiring color code but we still can help you determine what to do with the wires of your trailer. First we need to identify what all of the functions of your wires are. To do this you'll need to use a jumper wire from a vehicle battery to all of the wires to watch what circuit illuminates on the trailer and then wire them to the new 7-way using the diagram I attached. The brake circuit won't illuminate anything but you should...
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• Could Additional 7-Way be Ran to Rear of Travel Trailer by Wiring it to Junction Box
  Sounds like you are wanting to run an additional 7-way to the rear of your trailer by having a 7-way with lead like part # H20046 also wired to the junction box. This technically would work fine. This harness is 8 feet long.
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• What is the outer Diameter of the Cable on 7-Way Molded Trailer Wire Connector, # H20046
  I went out to the warehouse and grabbed a 7-Way Molded Trailer Wire Connector # H20046 to measure it for you. I used a set of digital calipers to get an accurate measurement. The diameter of the outer black sheath is 0.59 inches or 19/32 of an inch. A hole 5/8 of an inch would be perfect for this size cable. I have included a link to a video review of this connector for you.
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• What is the Reverse Light Wire on the Hopkins Molded Trailer Wire Connector # H20046
  If you will be using the Hopkins Molded Trailer Wire Connector, # H20046, then the yellow wire will attach to the wire from your reverse lockout solenoid. The yellow wire is attached to the center pin on the connector and the center pin in the trailer connector on your tow vehicle is for the reverse lights. Once the vehicle is shifted into reverse, the solenoid will close. I have attached a table that shows all of the wire functions for this molded trailer connector.
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• What Circuit Does Purple Wire of 7-Way Usually Carry
  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.
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• Hopkins 7-Way Trailer Connector to Older Featherlite Wiring Recommendation
  The diagram you attached shows a 7-way wired up in what is considered the "traditional way." If you check out the chart I attached you will see the three ways (really only 2), that a 7-way can be wired. The Featherlite is wired up like the diagram on the left. Now to wire up the # H20046 all you would need to do is wire up the connector by FUNCTION and not color. If your trailer has the same wire colors as the diagram you attached the blue wires would match up, the brown of the trailer...
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• Diagram to Use for Wiring 4-Way to 7-Way
  Your 4-way colors are standard so the white is ground, yellow is left turn/stop, green is right turn/stop, and the two brown wires are for the running lights. Since running lights are on both sides of the trailer they gave you two wires for each side. You can run the wires together and run them to the running light pin of a 7-way which is the 11:00 pin. I attached a diagram for a 7-way for you to use as well.
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• What Gauge Wire Should be Used to Wire Trailer Brakes
  That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary. On a smaller trailer with a single axle of brakes 12 gauge wire would probably be enough. But for a longer tandem axle trailer I would recommend you run 10 gauge wire to all the assemblies just to minimize the amount of resistance that would be on...
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• How to Ground Trailer Brakes on an Aluminum Trailer
  On an aluminum trailer I would recommend you ground the brakes by running the ground wire back up to the ground circuit of the connector on the trailer. Aluminum frames do not make the best ground points so I wouldn't ground the assemblies to the frame. You would most likely have pretty weak braking performance if you did. I attached an FAQ on wiring that you might find helpful also.
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• Brake Lights On Trailer Do Not Work with Tail Lights On
  I have attached the functions of the Hopkins 7-Way RV Style Connector with Molded Cable part # H20046 for you below however, if you are having issues with certain lights not working while others are turned on then I can almost guarantee you have a ground problem. In order to fix this I recommend you run the ground for each light up to the main ground for the trailer connector. If you have already done this then remove the ground, sand down the surface, and then reattach with new hardware....
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• Does 7-Way Molded Trailer Wire Connector Have a Reverse Light Function
  Yes, the center pin on trailer side wiring harness # H20046 is for reverse lights on the trailer. For this particular harness it is the yellow wire. But it will only work if the center pin is functional on your 2012 Toyota Tacoma. If you have the factory installed 7-Way on the Tacoma then it should be active.
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• Troubleshooting Trailer Lighting that Stops Functioning When Headlights are On
  Your main problem is an insufficient ground for the trailer wiring. Try improving the connection of the main ground wire of the trailer wiring harness. Make sure it is attached to a clean metal surface. Or you can run all of the trailer wires back to the main ground. This is actually the ideal solution. But you can also check the current grounds for the lights to make sure they are making a solid connection to a clean metal surface. When the vehicle headlights and trailer running lights...
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• How to Wire Trailer Light to Trailer with Unknown Trailer Wiring Color Functions
  The colors your trailer has are not standard colors so your best option would be to use a jumper wire from a 12 volt battery to each of the wires to determine their function and then wire by function.
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