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Replacement For 7-Way Socket That Came With ETBC7/ETBC7L Kit  

Updated 09/09/2026 | Published 09/04/2026

Question:

My ETBC7Ls 7-flat socket had the 12v blade corrode away. I now know that I should have been putting dielectric grease on it. Is it possible to get just a replacement 7-flat socket that will fit this?

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Expert Reply:

Hey Karl, thanks for reaching out. Yes, you can get a replacement for the 7-way socket that came with the # ETBC7L kit. For that you'll need the following:

- Buyers Products Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat # 337TC1474P

I also recommend grabbing a tube of Dielectric Grease for Electrical Connectors # 11755 to keep it protected.

What kind of vehicle is this going on?

expert reply by:
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Jesse M
Buyers Products Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat
Buyers Products Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat
(click to enlarge)
Karl profile picture

Karl

9/9/2026

Thanks for the information. I had already been looking at #11755 as the likely replacement, so I'm happy to have that confirmed. This had been installed on a 2022 Toyota RAV-4 Prime, and had been working fine until this point. One more question: Could the corrosion have been facilitated by the fact that the 12V blade is always "live". Would adding a switch for the 12V power to be connector be worth the trouble?

Jesse M. profile picture
Etrailer Expert

Jesse M.

9/9/2026

@Karl Yes, having the 12V auxiliary pin constantly powered can contribute to corrosion if moisture or road salt gets inside the 7-way, but I don’t see a need to add a switch or relay just to prevent it. A good 7-way connector is designed to handle an always-live 12V circuit, and keeping the socket clean, covered, and protected with a light coating of dielectric grease is a much better solution. If you’re seeing heavy corrosion, I’d focus on where the moisture is getting in rather than changing how the 12V circuit is powered.

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