Adapter for 7-Pole Round on Semi to 7-Way Flat Blade Style Trailer Connector

Question

Question:

That adaptor will not work by itself. Being the fact that the truck has separate brake lamp and direction feeds. I will need a 3 to 2 converter as well. Did my research after e-mailing you. Thanks for your help.

asked by: Dan M

0

Expert Reply:

It sounds like you are trying to go from a 7-pole to a 7-blade trailer connector. If the 7-pole is on the vehicle and the 7-blade is on the trailer then you can use the Pollak Trailer Connector Adapter part # HM47425.

expert reply by: Conner L

0

Dan

6/10/2019

That adaptor will not work by itself. Being the fact that the truck has separate brake lamp and direction feeds. I will need a 3 to 2 converter as well. Did my research after e-mailing you. Thanks for your help.

Conner L.

6/10/2019

Correct, the Pollak Trailer Connector Adapter part # PK12-724 is designed for a trailer side connector in which the stop and turn signals are already combined. If your stop and turn signals are not already combined then you would first want to install the Roadmaster Brite-Lite Wiring Converter part # RM-732 before the trailer connector. If this is the route you were to take then I recommend just installing the Pollak Black Plastic, 7-Pole part # PK12-707E after the converter instead of the Pollak Trailer Connector Adapter part # PK12-724.

Answer 1

You will first need to make sure that the new tail lights are wired the same as the old ones. There are basically 2 types of wiring systems. First there is a 2-wire system that has combined turn signals and brake lights on the same circuit/bulb. And…

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Answer 2

Attached are some photos of the typical wiring functions for truck and trailer 7-Way blade connectors, like parts #PK11893 and #PK12706. If you typical pull a trailer that has a 7-Way connector then you want to follow the pin out diagrams I…

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Answer 3

The best way for you to connect a 7-Way RV trailer connector to your Semi is by installing an RV-Style 7-Way socket, and for that I recommend the Pollak 7-Pole, RV-Style Trailer Connector Socket #PK11898. We do have some adapters on our site but…

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Answer 4

We do have exactly what you are needing to tow a trailer with the standard 7-Way blade with your commercial dump. To combine the turn/brake signals from your tow vehicle you simply need to use the Roadmaster Brite-Lite Wiring Converter #RM-732. After…

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Answer 5

I do have a potential option for you, but we do not have any kind of custom fit wiring harness that will connect to the plug in your picture. Since there isn't an adapter to go from a semi 7-Way to an RV 7-Way the best solution is going to be to…

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Answer 6

If the trailer is one that is pulled by a motorcycle or a trailer designed to carry a motorcycle, you will need a converter in order to convert the wiring system used by the 6-Way to a 2 wire system used by trailer lights. The converter you can use…

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Answer 7

It's a wire color difference but not a function difference on the pins of the 7-way. The difference comes from the fact that the two different styles are representative of two different areas that uses trailers. Traditional is usually seen on…

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Answer 8

We do have converters that do separate out the combined brake light and turn signal but #TR118821 is not one of them. What you can use instead is tail light converter #118158 or #C56196. They both do the same thing. The white input wire is ground…

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Answer 9

Adapter #HM47425 is designed to work with a vehicle or RV style 7-Way round pin so it would not work with the semi style 7-Way for the exact reason you mentioned; the functions are different. You could install a separate 7-Way just for travel…

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Answer 10

There are two types of lighting circuits for vehicles and trailers which are separate systems and combined systems. A separate system will have a separate wire for the brake and turn signals whereas a combined system will have a single wire for the…

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Answer 11

There isn't a plug-in style adapter for your application since the semi trucks have their brake lights separate from their turn signals. So what you'd want to do is install a 4-way first on the semi with the part #119190KIT and then convert…

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Answer 12

I am not aware of any adapter on the recreational towing market that will convert a semi truck connector to an RV style connector, but we do carry the necessary parts to equip your tractor to tow a fifth wheel trailer using the following parts: -Tail…

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Adapter for 7-Pole Round on Semi to 7-Way Flat Blade Style Trailer Connector

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