Adapter 4 Pole to 6 Pole

Tow Ready Wiring - 30637

Tow Ready adapter converts your 4-pole wiring harness on your vehicle to 6-pole round connector.

Adapter converts your 4 pole wiring on vehicle to 6 pole round connector. Additional leads for brake (blue) and power (black) can be connected to allow for electric brakes and accessories.

20320 Adapter 4 Pole to 6 Pole

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Value - This item

Adapter 4 Pole to 6 Pole

48 reviews

Code: 30637

Retail:$27.20

Our Price: $22.14

• Wiring
• Wiring Adapters
• Single-Function Adapter
• 4 Flat
• Plug and Lead
• 6 Round
• Tow Ready

Tow Ready adapter converts your 4-pole wiring harness on your vehicle to 6-pole round connector.

more information →

Economy

Price: $7.70

$14.44 Less

Pollak 6 Pole to 4 Pole Connector Adapter

28 reviews

Code: PK12717

Our Price: $7.70

• 6 Round
• Plug Only
• 4 Flat
• Pollak

Quickly and easily convert a 6-pole, round pin connector to a 4-pole, flat connector with this RV connector adapter. Adapter has a non-corrosive nylon shell.

more information →

Value

Price: $14.54

$7.60 Less

Mighty Cord Trailer Connector Adapter - 4-Way Flat to 6-Way Round - 12" Harness

2 reviews

Code: A10-6034VP

Retail:$17.63

Our Price: $14.54

• 12 Inch Long
• Mighty Cord

Convert your vehicle's 4-way flat trailer connector to a 6-way round. Plug the 4-pole connector into your vehicle and connect the wire leads to get 12V power and the electric brake function.

more information →

Premium

Price: $23.86

$1.72 More

Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector

358 reviews

Code: 30717

Our Price: $23.86

• 1 Foot Long
• 7 Blade

more information →

Video of Adapter 4 Pole to 6 Pole

Videos are provided As a guide only. Refer To manufacturer
installation instructions And specs For complete information.

Tow Ready Wiring 30637 Review

Ask the Experts about this Tow Ready Wiring
Do you have a question about this Wiring?

• Why Does my 4-Way Connector Have 2 Wires Ran to One Prong for the Tail Light Circuit
  
• It sounds like you need an Optronics wishbone wiring harness, part # A35W42B. This 4-Way has a prong that has two wires that come out of it. The reason some 4-Ways have two wires coming out of one port is because that prong represents the tail light functions for both sides of the trailer. So one wire would run to the tail lights on one side of the trailer, and the other wire would run to the other. I attached a video below that shows this product being installed onto a trailer and...
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• Trailer Wiring Has 5-Wires White, Yellow, Green, Yellow/Brown, and Green/Brown
  
• On a 4-Way flat trailer wiring harness, white is the ground, brown is running lights, yellow is left turn signal and green is right turn signal. It sounds like your trailer has a wishbone harness. A wishbone harness splits the running light circuit at the connector so you do not have to run a jumper from one side of the trailer to the other side. On a wishbone 4-Way connector the white wire is ground, yellow is left turn signal, yellow/brown is left side running lights, green is right...
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• Some Trailer Lights Are Not Working But Running Lights and Marker Lights Are Not
  
• You are probably on the right track in thinking a grounding issue is at fault. Often if a trailer has a weak or marginal ground connection it will be able to pass enough current for lower current draw lights (such as the turn signals that are not on continuously) but not enough for the always-on running and marker lights. I suggest you recheck the security of the ground connections. You can try sanding off paint (or rust) at the spot where your ground wire ring terminals are attached....
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• 6 Prong Square on Jayco Trailer to 4 Prong Flat Wiring Color Scheme
  
• The wiring colors codes for the Jayco style 6-Way connector are not readily available. I can tell you that the following colors have worked out on a Jayco trailer before. Yellow - Not determined, Green - tail light, White - ground, Red - left turn and brake, Black - not determined and Brown -right turn and brake The leftover yellow and black wires would be used for auxillary power and backup lighting or trailer brake power, whichever is needed. You would need to use a circuit tester,...
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• Wiring Up a Harbor Freight 4-Way Trailer Connector and Trailer Lights
  
• Lets start with the trailer connector. I can tell you what the functions are so it will be easy to connect to the lights once we determine their functions. On a 4-Way, you will have one pin that is covered. That is the ground. Right next to it is the running light pin. Then the left turn/brake light pin. And the last pin is right turn and brake lights. Now, on the lights, since the common wire on both sides is red, I am inclined to believe this is the running light wire. What you...
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• Adapter to Connect 4-Way on Vehicle to 6-Way Round on Trailer
  
• A vehicle end wiring harness using a 4-Way Flat connector should have 3 female plugs and 1 male pin. A matching 4-Way Flat trailer connector would have 3 male pins and 1 female plug like on the Tow Ready Adapter 4-Way Flat to 6-Way Round, part # 30637. The # 30637 adapter is designed to plug into a 4-Way Flat on a vehicle and the 6-Way Round on the other end, with the male pins, will plug into a 6-Way Round on the trailer that has 6 female plugs. I am including a link to a FAQ page...
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• Adapter for a 4-Way Flat Vehicle End Trailer Connector to 6-Way Round Pin Trailer Connector
  
• If you only want to use the basic lighting functions provided by the 4-Way (left/right turn, brake, and running lights) then all you will need to do is plug the 4-Way end of the Adapter 4 pole top 6 pole, # 30637, into your vehicle 4-Way. The trailer 6-Way will then plug into the 6-Way receptacle on the adapter. You will also need to ground the white wire on the adapter to the vehicle frame at a clean and corrosion free metal surface. The remaining wires (blue for electric brakes and black...
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• What Adapter is Needed For Borrowed Trailer Pulled By Mercedes-Benz ML350
  
• It sounds like you have a 7-way connector on your ML350. If the trailer you plan on towing has the female version of your connector then you will not need an adapter. The other possible situation is you have the 7-way male connector on your ML350 and the trailer has a 4-way. If this is the case then Hopkins # HM47365 should work. In order to determine exactly what will work with the trailer, we will need to know what connector is used on the trailer. Not all trailer companies use the...
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• Wiring a 5 Wire Volvo Semi Tractor to a 4 Wire Gooseneck Trailer
  
• To make the 5 Wire system on the Semi work with the 4 Wire system on the gooseneck trailer you will need to use a converter. The 4-Pole Hardwire Kit with Converter (Includes Tester), item # 119178KIT will provide you with a 4-Way connector that is converted to the 4 wire system on the trailer. You would then need to use either the Adapter 4 Pole to 6 Pole, item # 30637, or the Adapter 4 Pole to 7 Pole, item # 30717, to complete the conversion to the style of connector that is on the gooseneck...
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• Availability of a 4-Way Flat to 6-Way Round Trailer Connector Adapter
  
• We actually have a pre-made 4-Way to 6-Way round adapter that you could use if you wanted to, # 30637. For this you would plug in the 4-Way on the vehicle to the 4-Way on the adapter, ground the white wire to the frame of the vehicle, and tape up the other 2 wires on the adapter if those functions are not needed (if you just needed lighting functions). To make your own you would need a 4-Way trailer end connector, like # HM48110, and wire the blunt cut bare wire ends to the 6-Way round...
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• Brake Controller Wiring on a 2002 Ford F-250
  
• For the Pilot 2-6 Brake Electronic Brake Controller - Time Delayed # 80550 you can use Brake Control Wiring Adapter # 3035-P. If you have factory 7-Way the only part needed to install a brake controller is the brake controller and wiring adapter. Usually the factory will already give you a brake control adapter that connects to the brake controller and plugs into the dash. If you do have this harness you can also use it with the Pilot. The OEM plug is on the drivers side, usually on...
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• Trailer Connector has 4 Pins But 5 Wires
  
• I am a little confused as to were the connector is, on the truck or on the trailer. Brown wires are typically associated with running lights. If there are 2 wires coming out of that pin and we are talking about the trailer side then you have what is called a wishbone harness. It will still function exactly the same as a regular 4-wire 4-Way connector. It just has 2 running light wires to run to the 2 sides of the trailer to limit the amount of splicing you have to do. If we are talking...
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• Wiring For the 2011 Jetta TDi Sedan for Towing a Trailer with Reverse Lights and Electric Brakes
  
• The bypass that you mentioned is most likely the power wire that allows this harness to draw power directly form the vehicle battery and eliminate the possibility of overloading the sensitive circuitry and computers on your 2011 Volkswagen Jetta. The CURT wiring harness, # 56146KIT, is designed to work with your vehicles electrical system and does have the separate 12 volt power wire to protect your vehicle wiring. To tow a trailer with reverse lights you would need to use the Universal...
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• Trailer Hitch, Drawbar, Hitch Ball, and Trailer Wiring Recommendations for a 2008 Jeep Commander
  
• I can certainly point out everything you will need to tow the boat with your 2008 Jeep Commander. First, you will need a hitch. There are several available but I recommend going with a Class III hitch rated for weight distribution because you never know what you might be towing in the future. I would go with Draw-Tite Trailer Hitch, # 75338. This is a Class III, 2 inch trailer hitch, capable of 500 pounds tongue weight capacity and 5,000 pounds gross trailer weight. When used with weight...
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• Availability of Adapter For Connecting 6-Way Round on Trailer to 4-Way Flat on Tow Vehicle
  
• I would recommend to use the Tow Ready 4-Way to 6-Way Adapter, part # 30637. If you only want to use the basic lighting functions provided by the 4-Way (left/right turn, brake, and running lights) then all you will need to do is plug the 4-Way end of the # 30637 adapter, into the vehicle 4-Way. The trailer 6-Way will then plug into the 6-Way receptacle on the adapter. You will also need to ground the white wire on the adapter to the vehicle frame at a clean and corrosion free metal surface....
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• Wiring Connections For Wishbone Harness To Use On Trailer Wiring
  
• It sounds like you have a wishbone harness. On a typical 4-way connector, you would have a yellow wire that would be for a left turn and left brake light signal, and a green wire for the right turn and right brake light signal. You would also have a single brown wire for the running lights and a white wire for the ground. A wishbone connector will have a brown/green wire for the running lights on the right side, and a yellow/brown wire for the left side running lights. you will also...
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• Troubleshooting Plug and Play T-Connector Trailer Wiring Harness Not Working on a 1992 Toyota Pickup
  
• As long as your vehicle is a 1992 Toyota Pickup and not some other model like a T100 pickup, you have the correct wiring harness. There are two possibilities for the symptoms you are describing. A ground issue or a short between the taillight circuit and turn signal circuits. Because there would need to be a short between both the left and right turn signal circuit and the ground I would think that would not be the issue, unless the converter box has been shorted out. Since you have...
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• Adapting a 6-Way Square Jayco Trailer Connector to 7-Way on Vehicle
  
• The easiest thing to do would be to replace the 6-Way square on the Jayco trailer with a 7-Way, # PK12706. You can adapt the 6-Way Jayco to the 7-Way on your vehicle. But it will take a little bit of work. First, you will need 6-Pole Square Trailer Wiring Connector Kit # 37995 because the Jayco square plug doesn't fit any other 6-Way square. This part has both the vehicle end and the trailer end which will both be needed. Then you will need a trailer side 7-Way such as # PK12706....
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• How Does Trailer Running Light Circuits with Yellow/Brown and Green/Brown Wires Run to New 4-Way
  
• The yellow/brown and green/brown wires are the running light circuit on the trailer. The new 4-way that has a single brown wire can still be used but you will need to run both wires of the trailer to single brown wire on the 4-way. This is a very common way to wire up a trailer and it will work great for you. If this configuration isn't working you will need to determine if the voltage is on the brown wire of your trailer when the running lights are on or not. If so, and still not working...
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• Adapter 4 Pole to 6 Pole # 30637 Recommendation and Wiring
  
• It sounds like your trailer has a 6-way round connector and your truck has a 4-way flat connector. You could use an Adapter 4 Pole to 6 Pole, part # 30637, like what you referenced. If all you needed was tail light functions on your trailer you would simply mount the 6-way round of this adapter on your vehicle and secure the other wires up and out of the way, and then plug the 4-way from your truck into the 4-way of this adapter and then plug your trailer into the 6-way and you would...
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• Availability of a 6-Round to 4-Flat or 7-Way to 4-Flat Trailer Connector for an RV
  
• It sounds like what you want to do is to pull a trailer with a 4-Flat with an RV that has a 6-Round. 6-round connectors are not too common on RVs, but more common on horse trailers. Double check to see if you actually have a 7-Way blade style connector. A lot of connectors look alike. I have included a link to a Trailer Wiring FAQ article that, in part, discusses the various style connectors starting about 1/4 of the way down the page. To convert a 6-Round to a 4-Flat, you can use a...
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• Trailer Connector is a 4-Way Flat but has 5 Wires
  
• On the vehicle side connector, white is ground, brown is running lights, yellow is left turn/brake lights and green is right turn/brake lights. On the trailer side, since the black is the ground we can move on to the other wires. You likely have 2 running light wires, one for each side of the trailer. This is done so you don't have to splice in a jumper wire from one side of the trailer to the other. So the yellow wire is likely the left turn and brake light, green is likely right turn...
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• Wiring for a 2017 Buick Encore and a 2007 Ural Retro to a 6-Pin Round Wiring Harness
  
• To add a 6-Pin round connector to your vehicle you will need an adapter in addition to the wiring harness that you referenced. For your 2017 Buick Encore the Curt T-Connector Wiring Harness # C56363 is where you'll need to start. The Next thing that you will need is the 4-Pole to 6-Pole Adapter # 30637. This will plug right into the 4-Way that you already have installed on your Encore. All you have to do at this point is add the extra wiring using 10 Gauge Wire # 10-1-1 in addition to...
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• Recommend Hidden Hitch, 6-way Wiring, and Other Needed Accessories For 2009 Nissan Murano
  
• I can recommend a hitch, wiring, and additional accessories that you will need to complete your towing setup on your 2009 Nissan Murano, but all of our hitches and wiring are sold separately. The hitch you selected, Hidden Hitch Trailer Hitch, part # 87486 does not have hidden wiring included. For a hitch, I would recommend the item you selected, Hidden Hitch Trailer Hitch, part # 87486, as it is a Class III Hitch with 2 inch receiver. For wiring, you will need Tow Ready Custom Fit...
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• Troubleshooting Brake Light on Trailer Towed by 1998 H-D Road King and 2003 Ford Crown Victoria
  
• Because the 2003 Crown Vic uses a separate bulb in the tail light assembly for the turn signals, a tail light converter is needed. If the 4-pole you have does not have a converter, and its simply been tapped into the turn and running light circuits, it would explain why the brake lights on any trailer you connect to the vehicle are not working. You can easily test this using a circuit tester like part # 40376. Attach the alligator clip on the tester to the ground pin on the connector (fed...
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• 4-Way Connector Needed to Replace 4-Way on Trailer with 6 Wires
  
• Since you have six wires it sounds to me like you have a double ground and a left and a right side tail light wire. If this is the case you could use a wishbone harness like the 20 ft. Wishbone 4-Way Trailer Wiring Harness with 30" Ground Wire, # A20WB, as a replacement because it has the separate left and right side tail light wires. I recommend using a spare car battery to assist with testing the trailer wires for function. You will just need to ground the negative terminal of the...
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• Availability of a Replacement Jayco 6-Way Trailer Side Connector
  
• Jayco is the only manufacturer that uses that type of 6-Way connector. We do not have a replacement that is going to work. Since yours is broken this is the perfect time to install a 7-Way connector on the trailer so you do not have to mess with various adapters. If you do not want to change to a 7-Way on the trailer then you would need to get a replacement trailer side Jayco 6-Way from Jayco. But to add a 7-Way RV style connector to the trailer you can use something like # H20042. You...
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• 4-Way Trailer Connector that has 5 Wires
  
• Did you have a 4-pin connector that had 5 wires or was it a 5-pin connector? There is a big difference since you normally see a 5-pin connector on a boat trailer with the 5th pin used for an electric reverse lockout solenoid on a brake actuating coupler. If it was a 4-pin connector with 5 wires then it is called a wishbone harness and would have 2 wires attached to the running light pin so you have one wire for each side of the trailer. Typically, on a 4-Way, the white wire is ground,...
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• Wiring A 2008 Toyota Highlander for Towing a 1996 Flagstaff Cobra Camper with 6-Way Square Connector
  
• Jayco uses a different wiring code than most, so in all likelihood, it will not work. I would just cut off the 6-Way square, tape off the brake and battery wires, and connect the 4 wires to a new 4-Way flat connector like part # 9653P. A better solution may be to install a more common 6-Way Round trailer connector on the vehicle and trailer. You could use the Pollak 6-Pole, Round Pin, Trailer Wiring Connector, item # PK11604, on the trailer end and a 4 Pole to 6 Pole Adapter, item #...
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• Adapting Motorcycle with 4-Pole to Trailer with 6-Way Connector
  
• You will need a converter/adapter when connecting different wired vehicles. Depending on how your vehicle and trailer are wired we have three 4 to 6 wire adapters. Adapter 4 Pole to 6 Pole # 30637 Adapter 4 Pole to 6 Pole and 4 Pole Trailer Wiring Adapter # 37175 If your trailer has brakes you will need a brake controller and for a motorcycle you will need a model that has time delay functionality. I would recommend the Activator IV by Draw-Tite, part # 5504. This will work with...
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Information for this part was:

Expert Research:
Michael L

Expert Research:
Robert G

Expert Research:
Michael H

Expert Research:
Jeff D

Expert Research:
Jameson C

Expert Research:
Adam R

Updated by:
Laura H

Expert Research:
Lori W

Expert Research:
Jeffrey L

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