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Old 10-26-2015, 06:13 PM   #1
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Trailer wiring

I purchased a small enclosed trailer to tow behind my 2016 Gand Tour. I brought it home behind my car (Mercedes GL series) and the lights worked fine with a stock 7-4 converter.

When I connect it to my AI only the turn signals work. Does anyone know if I need a different set up before I start troubleshooting the wiring into the 7 way plug?

Thanks!
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Old 10-26-2015, 06:19 PM   #2
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I purchased a small enclosed trailer to tow behind my 2016 Gand Tour. I brought it home behind my car (Mercedes GL series) and the lights worked fine with a stock 7-4 converter.

When I connect it to my AI only the turn signals work. Does anyone know if I need a different set up before I start troubleshooting the wiring into the 7 way plug?

Thanks!
The 7-pin connector on an Interstate is completely US standard. I use a 7-to-6 umbilical for pulling my toad and everything works fine.

However, Sprinter vans don't play well with trailers that have LED lights. If your trailer has LED brake lights, you may need to add a resistor to the trailer's brake light circuit to allow the lights to draw enough current that the van can recognize that they're plugged in.
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Old 10-26-2015, 06:27 PM   #3
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I have led lights so I bet you are right! I will research the diode before I tear into the 7 way wiring. Any suggestions where I can learn about that (etrailer, you tube, etc)?

Bob
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Old 10-26-2015, 06:35 PM   #4
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I have led lights so I bet you are right! I will research the diode before I tear into the 7 way wiring. Any suggestions where I can learn about that (etrailer, you tube, etc)?

Bob
NAPA Auto Parts. Talk to the guy at the parts counter and tell him what you need, and they should be able to help.
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Old 10-26-2015, 06:38 PM   #5
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Thank you!

Bob
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Old 10-26-2015, 07:57 PM   #6
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Led trailer adapter

I am going to try this and hopefully it will solve my problem.

From the etrailer.com website.

Tow Ready Wiring - TR20141
Tow Ready 7-way connector to 5-way or 4-way flat connector for 2007 and current Volkswagen Touareg, Audi Q7 and Porsche Cayenne (or any vehicle with a factory specific 7-way plug) when towing a trailer equipped with LED lights



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NAPA Auto Parts. Talk to the guy at the parts counter and tell him what you need, and they should be able to help.
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Old 10-27-2015, 09:03 AM   #7
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The 7-pin connector on an Interstate is completely US standard. I use a 7-to-6 umbilical for pulling my toad and everything works fine.

However, Sprinter vans don't play well with trailers that have LED lights. If your trailer has LED brake lights, you may need to add a resistor to the trailer's brake light circuit to allow the lights to draw enough current that the van can recognize that they're plugged in.
When you say the 7-pin connector is US standard do you know if I will need a 3-2 adapter since the Sprinter has amber turn signals and my trailer doesn't?

Thanks in advance!

Bob
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Old 10-27-2015, 09:36 AM   #8
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When you say the 7-pin connector is US standard do you know if I will need a 3-2 adapter since the Sprinter has amber turn signals and my trailer doesn't?

Thanks in advance!

Bob
No, you won't need a 3-2 adapter. The fact that the van's turn signals and brake lights are on separate bulbs makes no difference to the 7-pin connector.

The answer might be different if you were setting up a toad that had amber turn signals, but in that case the adapter would be on the toad, not the van.
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Old 10-27-2015, 06:56 PM   #9
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Got it. I will report back if the adapter from etrailer solves the problem so others viewing this thread will know.

Bob
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Old 11-14-2015, 11:11 AM   #10
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Quote:
Originally Posted by bsedor View Post
I purchased a small enclosed trailer to tow behind my 2016 Gand Tour. I brought it home behind my car (Mercedes GL series) and the lights worked fine with a stock 7-4 converter.



When I connect it to my AI only the turn signals work. Does anyone know if I need a different set up before I start troubleshooting the wiring into the 7 way plug?



Thanks!

We've been successful towing an LED light featured trailer (Legend) behind last year's 2014.5 model, and our recently delivered new Airstream Interstate. Never any problems at all.

Click image for larger version

Name:	ImageUploadedByAirstream Forums1447521071.399767.jpg
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ID:	252037




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Old 11-15-2015, 06:53 AM   #11
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We've been successful towing an LED light featured trailer (Legend) behind last year's 2014.5 model, and our recently delivered new Airstream Interstate. Never any problems at all.

Attachment 252037




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The adapter that I purchased at etrailer specifically for German made vehicles seemed to do the trick! Not sure why it didn't work without the adapter though.

Bob
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Old 11-17-2015, 11:37 AM   #12
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ScottP very nice looking set up
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Old 11-17-2015, 11:34 PM   #13
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Thank you.

The trailer is used to transport bikes and kayaks, extra luggage and doubles as a way to sleep kids who don't want to be in their tent on a rainy night .... dogs who are wet from swimming in the river, and generally a catch all for traveling. Hardly know trailer is being towed.

It's a nice 6x12 lightweight all aluminum trailer from Legend Trailer, and I would recommend their product:

(Home > Legend Trailers > Enclosed Trailers > Deluxe V Nose Cargo - Legend)


I would not recommend their dealer, Beck's in St. John Michigan, unfortunately. Honesty and integrity aren't part of their normal business operation.
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Old 06-08-2016, 10:07 AM   #14
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hauling 6'X12' aluminum trailer w/ '16 Interstate EXT

[QUOTE=ScottP;1711978]Thank you.

The trailer is used to transport bikes and kayaks, extra luggage and doubles as a way to sleep kids who don't want to be in their tent on a rainy night .... dogs who are wet from swimming in the river, and generally a catch all for traveling. Hardly know trailer is being towed.

It's a nice 6x12 lightweight all aluminum trailer from Legend Trailer, and I would recommend their product:

---
This is a nice confidence boost since I am about to embark on my first adventure trailering my H&H 6'X 12' v-nose aluminum trailer (with similar contents) behind my 2016 Interstate EXT. Just nervous about mountain passes or need to pass on 2-lane highways. Any issues with being underpowered with this set-up?
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