Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Pole Flat

Pollak Wiring - PK12-724

This adapter plugs into your vehicle's 7-way, round-pin recepticle to adapt it for use with a trailer-end, 7-way, RV-style plug. The 7-way flat receptacle includes a hinged cover to keep dirt and moisture out of the connection.

Features:

• Adapter converts your 7-way, round-pin vehicle-end connector for use with a 7-way, RV-style trailer-end connector
  • Lets you tow a trailer with a 7-way flat plug
  • Works with any RV-style, 7-way plug
  • Connects ground, left turn, right turn and stop circuits
• Round, floating, solid brass pins in plug
  • Ensure minimum voltage drop
  • Align easily for maximum contact
• Spring-loaded, hinged door on socket to protect the interior from dirt and moisture
• Collar with 4 mounting holes lets you mount the socket to your bumper
• Plug is constructed of glass-filled nylon
• Socket is constructed of high-impact, ABS thermoplastic

Specs:

• Overall length: 14-1/2"
• Length between plug and socket: 7-1/2"
• Wire configuration:
  • White: ground return
  • Black: clearance, side marker and identification lights
  • Yellow: left turn signal and hazard signal
  • Red: stop lights and anti-lock devices
  • Green: right turn signal and hazard lights
  • Brown: tail light, rear clearance marker and license plate light
  • Blue: auxiliary circuit/ABS power
• Wire gauge:
  • White: 8
  • Red, blue: 10
  • Black, yellow, green, brown: 12
• 1-Year limited warranty

12-724EP Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Pole Flat

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

• Wiring Adapter Needed for Towing 5th Wheel Trailers with a Kenworth Tow Truck
  
• We have the items you need to make an adapter to go from the connector on your Kenworth tow truck to the plug on the fifth-wheel trailers you will be towing, but there is not a pre-made adapter available. There are several situations depending of which trailer connectors you need to adapt to,so I will list the parts for each. First, if you need to go from a round pin connector, like # PK11720 on your tow truck to a 7-Way RV style trailer connector, like # PK12706, on a fifth-wheel RV you will
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• Pin Designations of the 7-way Round and the 7-way Flat on the Pollak 7-way Flat to Round Adapter
  
• As you are looking at the front of either connector, on the round 7-way the 12:00 position is the ground which corresponds to the 5:00 position of the flat connector. The 2:00 position of the round connector is the tail and running lights circuit and corresponds to the 2:00 of the flat 7-way. The 3:00 position of the flat connector is the left turn and brake circuit and corresponds to the 8:00 position of the round connector. The 5:00 position of the flat connector is the ground circuit
  view full answer...


• Troubleshooting Trailer Brake Lights that Do Not Work When Parking Lights are Switched On
  
• It sounds like you have a poor or insufficient ground connection. The dead giveaway is that everything works okay unless the parking lights are on. When the parking lights are on, you are drawing near the maximum amperage through the trailer wiring, which is when a ground problem will manifest itself. Check the ground connections on both sides of the tractor/ gooseneck attachment. Make sure that the ground connection for the connector on the tractor and the trailer are secure and not corroded
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• Pollak 7-Way Round to 7-Way Flat Adapter Recommendation
  
• If your vehicle has a 7-way round connector like a Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket # PK11720 then you could use a Pollak Trailer Connector Adapter # PK12-724 to allow you to tow a trailer with a flat 7-way connector. I also attached an FAQ article on wiring for you to check out also. I would recommend you test the 7-way on your semi and determine if the 7-way has separate or combined tail light circuits. If you have separate circuits on the trailer connector you
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