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Old 09-04-2013, 05:04 PM   #1
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7Pin Wiring for Tent Trailers

Hey there

I've searched the 'net and briefly in the forums, but have not been able to find a definitive answer for this, so my apologies if this has already been answered elsewhere!

My understanding is that normally the 7th pin is for "Auxillary items" and is commonly used for backup lights on large trailers.

What's the 7th pin used for in a Jayco tent trailer?

(4 for lights, 1 for brake, 1 for power and...?)

Thanks in advance!
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Old 09-05-2013, 08:45 AM   #2
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Backup lights

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Old 09-05-2013, 09:07 AM   #3
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Backup lights

Attachment 9758
Hi emjayuu,

Thank you for the reply - however, I am asking what the 7th pin is wired to, specifically in a Jayco tent trailer (eg a Jay Series Sport 12 or a Jay Series 1207 for example).

I am aware that the AUX pin is commonly used in large trailers for backup lights.

-Rob
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Old 09-05-2013, 12:03 PM   #4
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I recently rewired my trailer connector, the previous owner's seller had changed it from the original 6 pin to a 4 pin. I "upgraded" to a 7 pin, since that's what I installed on my truck. When I wired the trailer side connector, there was no wire to connect for the center pin, commonly the reverse lights.

<TL/DR> nothing, at least on my trailer.
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Old 09-05-2013, 12:47 PM   #5
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I just realized there is a tech forum and that this question should likely have been posted there. Moderators, sorry!!!

I will post over there for a wiring diagram - maybe that'll help explain what I'm looking for.

Thanks to everyone that replied!
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Old 09-05-2013, 01:33 PM   #6
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Quote:
Originally Posted by rmarles View Post
I just realized there is a tech forum and that this question should likely have been posted there. Moderators, sorry!!!

I will post over there for a wiring diagram - maybe that'll help explain what I'm looking for.

Thanks to everyone that replied!
No problem at all. This was a good place to start being specific to a tent trailer.

It will be good practice for me to move your thread over to the Tech Talk.

Hope you get your question answered over in the Tech Forum. Some good resources here.

Best regards,
Doug
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Old 09-05-2013, 03:31 PM   #7
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It may not be wired to anything. Since most "prewired" tow vehicles come with a 7 pin connector JAYCO uses one for simplicity.
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Old 09-06-2013, 02:06 AM   #8
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Originally Posted by rmarles View Post
Hi emjayuu,

Thank you for the reply - however, I am asking what the 7th pin is wired to, specifically in a Jayco tent trailer (eg a Jay Series Sport 12 or a Jay Series 1207 for example).

I am aware that the AUX pin is commonly used in large trailers for backup lights.

-Rob
Apparently I totally misunderstood the question (and still do) but that's ok.
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Old 09-06-2013, 06:12 AM   #9
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One of my favorite resources for TT 7-pin testing and troubleshooting....

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Old 09-06-2013, 08:30 AM   #10
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usually the middle pin is not used for anything in the RV trailers. Some have adapted this Auxliliary unused pin for back-up lights.

The 7th wire is not connected to anything in my Starcraft 14RT OFF-ROAD TRAILER. Mine has a twist-on yellow connector covering the single wire end in the trailer cable wiring junction box...

You can see lots of trailer wring schematics and associated trailer wiring items at ETRAILER.COM
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