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Old 02-20-2011, 02:53 PM   #1
Junior Member
Join Date: Oct 2010
Posts: 3
Wiring Problem

Hi All,

Got a weird one for you, hope I can explain..

We had our 2001 Forest River Sierra 27FKSS plugged in at the house on a daily basis throught the week. One night when we got home we noticed all the marker lights were on.... Really confused since my understanding was the marker and tail lights only came on when the towing harness was plugged into the truck.
So I unplugged it, the lights were still on, so I unhooked the battery, then they went off. I am still unable to have the battery hooked up or plugged in without the marker and taillights being on. I can only assume its a short, but I don't even know where to start?? Do I have to disassemble have the trailer to find it???


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Old 02-20-2011, 03:16 PM   #2
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Join Date: Sep 2008
Location: Shenandoah Valley
Posts: 9,273
Check out the 7 pin Bargman connector here:

Make sure someone hasn't played a trick on you and run a jumper between the 12 volt and maker light prongs.......I have been known to do that to newbie unsuspecting camping partners.

If that is not the case, then you probalby have a short between those 2 wires.


Chap , DW Joy, and Fur Baby Sango
2017 F350 Lariat CCSB, SRW, 4x4, 6.7 PS
2017 Grand Design Reflection 337RLS
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Old 02-20-2011, 05:32 PM   #3
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Join Date: Mar 2008
Location: Southwest Alabama
Posts: 4,598
As Chap said, the 7-way is the place to start. I've heard of the 7-way shorting several times. I've even had to replace mine.
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
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