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09-28-2015, 10:43 AM
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#1
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Weekend Camper
Join Date: Apr 2015
Location: wi
Posts: 47
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7 pin
On the 7 pin trailer plug is the 12 volt pin the one that charges the TT battery when on the road?
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2016 RTZ Rezerve 29RK
2007 Chevy 2500 HD
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09-28-2015, 12:18 PM
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#2
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Full Time Camper
Join Date: May 2011
Location: So. Cal.
Posts: 577
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Yep. It's not the one in the center though as that aux/back up lights.
You will have specific trailer relays and fuses under the hood, dedicated to those circuits.
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Bob and Better Half
2007 F-250 PSD, SW, CC, LB, 2WD
2006 TF32SS Cross Terrain Toy Hauler (sold)
Reese 16k slider
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09-28-2015, 12:20 PM
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#3
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Full Time Camper
Join Date: Feb 2015
Location: SC
Posts: 679
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Yes. On some vehicles that pin is always "hot," on others the tow vehicle engine has to be running.
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Marty and Martha
2015 Z-1 211RD
2012 Nissan Titan
Dalzell SC
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10-01-2015, 09:16 AM
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#4
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Full Time Camper
Join Date: Oct 2011
Location: Upstate NY
Posts: 874
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One must ensure that the fuse is installed to energized the "charging" connection. On my 2005 Chevy I had to replace the dummy fuse with a real one (40 amp). On my 2011 the fuse was already installed.
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10-01-2015, 01:07 PM
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#5
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Seasonal Camper
Join Date: Feb 2013
Location: ohio
Posts: 356
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The factory had a dummy fuse on the #7 center pin on my Tundra.
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hondavalk
2008 Tundra 5.7L
2013 ST29SS
Reese DC
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10-01-2015, 05:46 PM
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#6
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Site Team
Join Date: Sep 2012
Location: PA
Posts: 5,715
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My F 150 had the "real" fuse in a plastic bag in my glove box.
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Mark & Susan
Lehighton, Pennsylvania
EAGLE HT FIFTH WHEEL | 30.5CKTS - '13 Ford F150 SCREW - PullRite Superslide - Roadmaster Active Suspension
Member - "Northeast Adventures RV Rally Group" & "Mason-Dixon Bunch"
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10-01-2015, 06:56 PM
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#7
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Site Team
Join Date: Jan 2014
Location: VA
Posts: 1,715
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My TrailBlazer had the fuse in the fuse box. I just needed to plug it in. It was already in place in my Silverado.
__________________
2013 Silverado 2500HD LTZ CC 6.6L Duramax Diesel
2023 Rockwood 2445WS
Buster, miniature Dachshund
2023: 9 trips, 48 nights in 12 states, 2 provinces, 8120 miles
2022: 3 trips, 18 nights in 4 states, 2352 miles
2019: 7 trips, 43 nights in 6 states, 5336 miles
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10-03-2015, 09:13 AM
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#8
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Weekend Camper
Join Date: Apr 2015
Location: wi
Posts: 47
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7 pin
I don't see a trailer charge fuse at all, I"ll have to ask a expert to look at it. Towing with this truck since new and didn't know it was not charging the TT batt. Our last TT had 2 batteries I guess that's why the batteries always had reserve power.
__________________
2016 RTZ Rezerve 29RK
2007 Chevy 2500 HD
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10-03-2015, 09:34 AM
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#9
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Site Team
Join Date: Dec 2007
Location: WI.
Posts: 9,153
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Quote:
Originally Posted by MartyinSC
Yes. On some vehicles that pin is always "hot," on others the tow vehicle engine has to be running.
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Quote:
Originally Posted by allenr
I don't see a trailer charge fuse at all, I"ll have to ask a expert to look at it. Towing with this truck since new and didn't know it was not charging the TT batt. Our last TT had 2 batteries I guess that's why the batteries always had reserve power.
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Martin gave a diagram that is the same as paying an "expert" to look at it.
Get your multi meter and check it out.
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10-03-2015, 09:51 AM
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#10
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Weekend Camper
Join Date: Apr 2015
Location: wi
Posts: 47
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7 pin
I'll do that
__________________
2016 RTZ Rezerve 29RK
2007 Chevy 2500 HD
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10-03-2015, 12:37 PM
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#11
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Full Time Camper
Join Date: May 2013
Location: So IL
Posts: 1,811
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Quote:
Originally Posted by allenr
I don't see a trailer charge fuse at all, I"ll have to ask a expert to look at it. Towing with this truck since new and didn't know it was not charging the TT batt. Our last TT had 2 batteries I guess that's why the batteries always had reserve power.
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I had an auto parts guy and a mechanic miss mine. Dealer found it right away. I spent a couple hours looking myself so don't feel bad.
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Tim
13 ST25RB
08 F-250 SC 6.8L XLT 4x4
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10-03-2015, 02:08 PM
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#12
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Site Team
Join Date: Sep 2012
Location: PA
Posts: 5,715
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My fuse block was in the engine compartment. The fuse looked more like a relay than a fuse.
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Mark & Susan
Lehighton, Pennsylvania
EAGLE HT FIFTH WHEEL | 30.5CKTS - '13 Ford F150 SCREW - PullRite Superslide - Roadmaster Active Suspension
Member - "Northeast Adventures RV Rally Group" & "Mason-Dixon Bunch"
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10-03-2015, 09:27 PM
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#13
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Full Time Camper
Join Date: May 2013
Location: So IL
Posts: 1,811
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Quote:
Originally Posted by mark5w
My fuse block was in the engine compartment. The fuse looked more like a relay than a fuse.
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Yep...you have to look at it real good to see if its blown.
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Tim
13 ST25RB
08 F-250 SC 6.8L XLT 4x4
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11-18-2015, 06:04 PM
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#14
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Weekend Camper
Join Date: Apr 2015
Location: wi
Posts: 47
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OK, there was no fuse, the wire for the 12 volt charge to the trailer has a loop end. This wire was never connected and was tied in a bundle with tape under the master cylinder. With help from the E-Trailer web site I was able to figure this out. If not for the wimpy battery in this TT I still might not know the truck never was charging the battery. I would like to have been a fly on the wall when the powers that be at GM came up with the plan to sell trucks with tow packages and leave the wires like this.
Thanks to all who share information on this website.
__________________
2016 RTZ Rezerve 29RK
2007 Chevy 2500 HD
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11-19-2015, 09:03 AM
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#15
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Full Time Camper
Join Date: Aug 2012
Location: Belle River , Ontario
Posts: 1,753
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You will probably find the wire for the brake controler taped up between the fuse box and the drivers fender.
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It was a rainy few days at Algonquin Prov park...tarps kept us dry.
Wayne --Belle River (Windsor), Ontario
2013 Sunset Trail Reserve 25RB..(just sold it)
2015 White Chev Silverado 2500HD 4x4 (6.0 l gasser)
2003 Mountain Star 890SBRX Truck Camper
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11-20-2015, 09:59 AM
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#16
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Full Time Camper
Join Date: May 2011
Location: So. Cal.
Posts: 577
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Quote:
Originally Posted by harley
You will probably find the wire for the brake controler taped up between the fuse box and the drivers fender.
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Not a bad dea to go back to the 7 pin with a vom and verify everything else is connected properly. Amazing!
__________________
Bob and Better Half
2007 F-250 PSD, SW, CC, LB, 2WD
2006 TF32SS Cross Terrain Toy Hauler (sold)
Reese 16k slider
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11-20-2015, 11:04 AM
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#17
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Seasonal Camper
Join Date: Aug 2015
Location: Tn
Posts: 384
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Is the 7 Pin factory? I could see if the hitch was all aftermarket, the dealer would make those connections as part of the install.
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11-20-2015, 05:00 PM
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#18
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Full Time Camper
Join Date: Aug 2012
Location: Belle River , Ontario
Posts: 1,753
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7 pin is factory but on some brands the live wire is not connected from the factory. No big deal , just put the wire connector on the bolt and put a nut on it . And get a fuse at the dealership...free of course.
some trucks have them already hooked up.
__________________
It was a rainy few days at Algonquin Prov park...tarps kept us dry.
Wayne --Belle River (Windsor), Ontario
2013 Sunset Trail Reserve 25RB..(just sold it)
2015 White Chev Silverado 2500HD 4x4 (6.0 l gasser)
2003 Mountain Star 890SBRX Truck Camper
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