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Establish a secure connection between your trailer and semi or other tow vehicle with this heavy-duty, 7-pole RV blade-style socket and mounting bracket.
Features:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today were reviewing part number PK12-704. This is from Pollak. It is the RV seven-blade plug and socket. Heres your mounting bracket right here, and what you do is you see your seven-blade in there. What you do is take off these screws, one here and one here and then remove the seven-blade. Then you want to run your wiring from your tow vehicle, run the cable with the wiring into the back here.
I think you can see the hole thats inside here. Then you run the wiring in there and pull it through. Then you connect your wire to the seven blade that youve pulled out.Once its connected you can push the seven blade back in there where it belongs. Then you do basically the same thing on the trailer end. Theres one screw right here.
You take that off, pull out the seven pin right here and you do the same thing with the wiring from the trailer into this end. Then you push the seven pin back in and thats how it works. There you have it for part number PK12-704 from Pollak, the RV seven-blade plug and socket. .
Customer Satisfaction Score:
100% were satisfied with this product
0% of customers were not satisfied
Ratings & Reviews

Daryl
9/20/2023
All good, no problems
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James
11/12/2025
Good product, robust and worth the money.