Wire Gauge of etrailer Trailer Wiring 7-Way Upgrade Kit

Question

Question:

What are the wire gauges of the conductors? And why isnt this info available on the webpage?

asked by: Mark B

0

Expert Reply:

Hey Mark, on the 7-way wiring of the etrailer junction box # e99011 that you referenced the 12 volt accessory circuit, the ground circuit, and the brake output circuit are all 10 gauge and everything else is 14 gauge.

expert reply by: Jameson C

0

Jameson C.

12/8/2025

Hey Mark, did the wire gauge details for the 7-way wiring on the junction box clear things up for you? Knowing how that worked out could help others checking the same kit. Your feedback might make it easier for them to confirm the right wiring setup.

Answer 1

Hi Karl; we have connectors like the #A7WCB which could take 8 gauge wire but none of our wiring harnesses come that way. Is this for a specific application like a Lance Camper? They're the only ones I know of that require the higher wire gauge…

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Answer 2

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 3

The first thing you need to do is put power to the wires to determine what their function is. You can use some spare wire to connect a 12v trailer battery directly to the wires in question and see what lights come one to determine their function.…

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Answer 4

Hello Pat, thanks for getting in touch. We deal in all sorts of cords and plugs for trailers, so we most likely will have what you are looking for. Can you tell me exactly what you are needing this cord for? What kind of plug is on your truck…

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Answer 5

Hey Will, thanks for reaching out. What I recommend for replacing your 7-way is the following: - etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector #e99011 Wiring your connections thru the junction box helps keep them…

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Answer 6

There is a difference between a 7-way round and and 7-way rv blade connector. If you take a look at the accompanying photo, which is from our linked article on trailer wiring you can see that the connector on the left has blade-style pins while the…

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Answer 7

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 8

The only difference between 7-Way Utility and 7-Way RV is the color of the wires. The pin outs are the exact same so either would work just fine with the other. If you check out the picture I attached you'll see that the functions are all the…

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Answer 9

Hey Carl, welcome back! You've done a great job of identifying the Lance 6-pin wiring functions and matching them up to the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box item #e99011. You don't need to worry about the blue wire…

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Answer 10

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 11

We have run into this quite a few times in the past, and the best option will be replacing the Lance 7-pin connector with a standard 7-way blade connector like the #PK12706. This will give you a standard 7-way connector to plug into the factory 7-way…

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Answer 12

Hey Michael, thanks for reaching out! The Dexter Nev-R-Adjust Electric Trailer Brakes #23-468-469 are an excellent choice, and will pair nicely with the Dexter Trailer Hub & Drum Assembly #84546UC3-EZ. This hub and drum comes pre-greased to…

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Wire Gauge of etrailer Trailer Wiring 7-Way Upgrade Kit

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