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

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 2

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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Answer 3

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 4

Yes, you can just plug in your 4-Way to the Hopkins Endurance connector, #HM47200, ground it, and not connect the remaining wires if they are not needed. You can tape them up and stow them out of the way. For future reference, the blue wire would…

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Answer 5

We actually sell a duplex cable that would be perfect for this application. Take a look at Jacketed 2 Wire, 10 Gauge, Brake Wire, #10-2-1. This is a jacketed wire with 2 wires inside, both are 10 gauge wires. It is sold in 1 foot increments so if you…

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Answer 6

A brake controller harness is not available for the Freightliner chassis vehicles but I can tell you the functions of the wires. First, lets look at your 5 wires. The red wire that is hot with the ignition is the 12 volt power wire and it will…

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Answer 7

Since your trailer has LED taillights we don't have a converter that will work. Normally we recommend the part #C56196 but this does not work with LED bulbs. Most likely have a converter already installed on the trailer wiring if it has been used…

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Answer 8

What I would do in your situation is take a trailer side 7-way like the #H20046 and make an adapter out of it for your camper. So when the camper is in your truck you could just plug in the adapter to the 7-way located in the truck bed. Without…

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Answer 9

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 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

Yes, it is possible to have both the air hose and electrical connections needed for a semi-trailer as well as the necessary connections for an RV trailer on the same truck. You will just need to install a few parts to be able to connect to and power…

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Answer 12

The trailer connector used on most semi-tractors is a 7-pin round which is similar to a 7-way flat used on most RV's but the big difference between them is how the stop and turn signals are wired. The stop and turn signal circuits are separate on…

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

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