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Old 09-27-2015, 12:03 PM   #1
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2014 27' FB International
Santa Rosa , California
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'13 Denali plug not charging

My7 prong plug to trailer power cord is not charging trailer battery. I checked fuse on fuse block on truck as ok but when I checked voltage at terminal receptacle I got no voltage reading. Any ideas?
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Old 09-27-2015, 12:48 PM   #2
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Did you check with the engine running? Some vehicles have a relay to only power the trailer when the engine is running. You may have to add the relay. Some trucks ship with the relay in a bag in the glove box.

Al
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Old 09-28-2015, 09:21 PM   #3
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Thanks

The truck was running when I checked voltage at terminal and when I had it plugged into Denali . When I had it hooked up interior volt meter inside trailer did not show charging (when battery had drained).

I will check with dealer as to relay.

Thanks
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Old 09-28-2015, 09:32 PM   #4
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Check youur manual. I looked at a 2013 2500 and there doesnt appear to be a relay but under "j-case fuses" #68 is the trailer power and it is listed as "optional".

Al
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2002 Classic 30 Slideout
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2013 Dodge 2500 Laramie 4x4 Megacab Cummins
2001 Safari 25 RB Twin (Gone, but not forgotten)
WBCCI 1322, TAC FL-39, AIR 82265

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Old 09-29-2015, 11:53 AM   #5
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Thanks, I did check fuse block and #68 in particular. It was there and seemed to be intact and not blown.
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Old 09-29-2015, 12:09 PM   #6
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1985 32' Excella
Valley Village , California
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I was having my trailer serviced at Airstream Los Angeles recently ( where they have Airstreams -2-Go rentals). They use Denali's for the tow vehicles, and the service guy said this is a common problem with these. He said the wire that GM runs back to the trailer plug harness is too small of a gauge, and the fuse burns out all the time. Now this was on the last body style of GMC's, so GM may have fixed this problem on the new ones.
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Old 09-29-2015, 12:52 PM   #7
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Sun Lakes , Arizona
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check pin out between TV and AS

Out TV pin out was different than the AS so I changed the cable between them to match
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Old 09-29-2015, 05:47 PM   #8
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2012 20' Flying Cloud
La Habra , California
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On our Tahoe, I had to find a bundle of two cables near the steering column under the hood. They are taped together. One is for the brake controller and the other is for battery charge. They must be connected to the large fuse box located under the hood drivers side. One is larger than the other. You may need to buy tapered nuts to install, if I remember correctly.
BTW on our 2008 Tahoe, we have never had blown fuse issues on the charge line.
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Old 09-30-2015, 07:38 AM   #9
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My '07 Yukon Denali XL had a cable that had to be unbundled and attached to the correct hot post on the fuse box. As I recall the required screw was not included so I had to find one that would work. Your '13 will be the same. I'm attaching a picture that someone else created, but looks correct.

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