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Old 05-17-2022, 02:53 PM   #1
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2020 30' International
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7 pin connector extension

I need approximately 18 inches of extension on my 7 pin wiring harness. Is there a reason I should not cut and and splice in enough wiring for the additional length. I understand all of the wire needs to be the correct gauge. I also understand it would need to be watertight i.e tape and heat shrink. I have not been able to find any posts addressing this. I know there are extensions that can be purchased but they all come the female end that needs to mounted to something and 3 ft is the shortest one I've found.
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Old 05-17-2022, 06:14 PM   #2
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Yes, your solution of splicing a short extension onto your pigtail should work just fine. Soldering and heat shrinking each wire, then heat shrinking the entire cable should be very robust. I would try to get a length of actual pigtail wire if possible, then the color code and gauge would be right.
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Old 05-17-2022, 07:15 PM   #3
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Buy one of these. I put mine under the propane cover. Lots of threads about this.
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Old 05-18-2022, 04:00 AM   #4
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Originally Posted by bbcubed53 View Post
I need approximately 18 inches of extension on my 7 pin wiring harness. Is there a reason I should not cut and and splice in enough wiring for the additional length. I understand all of the wire needs to be the correct gauge. I also understand it would need to be watertight i.e tape and heat shrink. I have not been able to find any posts addressing this. I know there are extensions that can be purchased but they all come the female end that needs to mounted to something and 3 ft is the shortest one I've found.


Skip the SOLDERING. Thats 1970. Find some POSI LOCK Connectors for the wire size you need. And skip the black gooey Tape!

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Old 05-18-2022, 04:40 AM   #5
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Go to the Propride 3P website. They sell 7-way cable extensions...
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Old 05-18-2022, 07:01 AM   #6
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Skip the SOLDERING. Thats 1970. Find some POSI LOCK Connectors for the wire size you need. And skip the black gooey Tape!

What I don't get about these are how exactly they guarantee the surface area contact of the entire conductor as you fan out the stranded wires. If 3 or 4 are "in the wind" inside the connector, doesn't that just decrease the current capability of the wire as a few strands may not be in contact with the cone?
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Old 05-18-2022, 08:07 AM   #7
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What I don't get about these are how exactly they guarantee the surface area contact of the entire conductor as you fan out the stranded wires. If 3 or 4 are "in the wind" inside the connector, doesn't that just decrease the current capability of the wire as a few strands may not be in contact with the cone?

Looks like the metal cone inside the barrel will ensure good contact with all the strands. Here's video I found about them:


That said, I'm not sure I'd use these to splice the 7-wire cable as they would create a huge bump in the cable with 7 of them.



My choice would be to install a new 7-wire cable and not splice it at all. For all the effort it takes to do a proper splice, it would be possible to just replace the whole thing. The only obstacle might be gaining access to where the 7-wire cable connection is inside the trailer, but if access is possible then just replace the whole thing.
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Old 05-18-2022, 10:20 AM   #8
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Propride 18 inch extention

https://store.propridehitch.com/7-pi...cal-extension/

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Old 05-18-2022, 10:22 AM   #9
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I bought this 18" extension from Hensley and used it until I replaced my 7-pin cable with a longer length and junction box suggested in post #3 above
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Old 05-18-2022, 04:03 PM   #10
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I had an extension as well but I didn’t like the extra point of failure so I eventually replaced my entire cord with a longer, more flexible and blue one!
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Old 05-18-2022, 08:27 PM   #11
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I had an extension as well but I didnít like the extra point of failure so I eventually replaced my entire cord with a longer, more flexible and blue one!
I lived with the extra point of failure until it failed too often; hence, the junction box. Bonus is that I attached the TPMS booster to the running lights wire in the junction box, as many others have done.
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Old 05-18-2022, 09:24 PM   #12
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Buy one of these. I put mine under the propane cover. Lots of threads about this.
I like this idea, does the color scheme match the AS wiring scheme?
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Old 05-19-2022, 01:05 AM   #13
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I like this idea, does the color scheme match the AS wiring scheme?
Color scheme matched my trailer. Best to verify it.

I bought the three most recommended junction boxes with eight feet of cable. They were identical in almost every way.
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