Recommendation For Getting Power To A Trickle Charger On A Trailer With A 4 Flat Plug

Published 11/11/2021

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Question:

Hi, My truck has a 7way round plug. My trailer no brakes has a 4 way flat. I am looking for a 7 way round plug that has a 4 way flat plug, and pigtails with the additional power wires from the 7 way. I want to grab the black 12v wire and run it to a trickle charger in my trailer. I see lots of combinations in your store but not this one? Thanks for your help

asked by: James N

Expert Reply:

The best way to accomplish what you want this to do will actually be to upgrade the 4 Flat plug on the trailer to a 7 Way. If you use something like the Hopkins # H20046, you will not need to connect all the wires. You will just need to match your blinker/brake signal, running light, and ground wires to the ones on the plug and them run the black wire to the trickle charger. A junction box like the # 38656 will also make this task a lot easier.

If you do prefer to keep the 4 Flat on the trailer though, you can add the Pollak Single-Pole # PK11851 to your truck with the # PK11771 mounting bracket. You can either piggy back off the 12 volt power wire going to the 7 Way, like the # C57674, or you can run a separate dedicated line for it as well. The Pollak Single-Pole # PK11852 can then be run to your trickle charger on the trailer side. It's kind of an odd solution, but it will work.

expert reply by: Lazer S