7 way plug replacement

[gordon2]

Originally Posted by jwcolby123

This^^^^^

This cord is only about trailer lights. I also need another junction box to distribute 12V. ..

Well, it includes the trailer brakes wiring, the charge line, and even back up lights.. all 7 pins assuming you wire them in from the trailer side. However if you want a bigger gauge for the charge line then yes, you will need to and add something.

[WDavidG]

Originally Posted by polskasila

The big problem is the plug contacts to tow vehicle are brass and corrode very quickly to the point of disintergration. I use an electric silicone and liberally fill the exposed contacts with the silicone. do this each time you disconnect. I have had no trouble since using this process.
Good luck,
polskasila

Helpful advice. Thanks Polskasila.

[jwcolby123]

Originally Posted by gordon2

Well, it includes the trailer brakes wiring, the charge line, and even back up lights.. all 7 pins assuming you wire them in from the trailer side. However if you want a bigger gauge for the charge line then yes, you will need to and add something.

I went out and looked and found 3 different 7 pin trailer plug "standards".

This one actually shows three different standards. One for utility trailers, one for RVs, one for "heavy duty". It appears that the difference between utility and rv is color wire. I'm going to nominate this one as the gold standard.

https://www.etrailer.com/faq-wiring-7-way.aspx

If you look out on ebay at least, the 7 wire cable is 14 gauge. Which makes sense for signal wires, but not for power and ground. Sigh.