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06-07-2011, 01:22 PM
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#1
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Senior Member
Join Date: Dec 2008
Location: Missouri
Posts: 190
SUN #763
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TV/TT Battery
We have a 2005 T 1950 and on the front of the TT there is a on/off switch to keep from draining the battery when the TT is in storage. My question is this: should that switch be on or off while towing. I have always turned it on so the TV can charge the TT battery. Is this correct.
Thanks
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Jim, Mary Jane and Lord Bentley (Beagle)
2005 Sunline T-1950 (Sold)
2006 Sunline T-2499 (Sold)
2014 Ford F150 Super Crew 4x4 Eco Boost
2012 Holiday Rambler Vacationer Motorhome
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06-07-2011, 01:40 PM
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#2
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Senior Member
Join Date: Jan 2009
Location: Rhode Island
Posts: 1,515
SUN #768
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Turning it on would be my choice. Also, the battery is needed by the electric brakes in a "breakaway" situation which I hope never happens.
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Gene & DW Ginny
2002 Sunline T-2363
2008 Toyota 4-runner 4wd 4.7L V-8
Reese Dual Cam straightline - P3 Brake controller
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06-07-2011, 02:59 PM
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#3
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Moderator Emeritus
Join Date: Jul 2009
Location: South Carolina
Posts: 2,040
SUN #897
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I also believe it's a law nationwide that if the trailer has electric brakes, it must also have a battery for emergency brake applications. I have a 14' utility trailer with electric brakes. It had no battery when I bought it and I had to add one.
Please be safe and make sure the battery switch is on.
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06-07-2011, 04:49 PM
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#4
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Senior Member
Join Date: Jan 2011
Location: Florida
Posts: 1,279
SUN #1830
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Might not hurt ot test the break away brake from time to time.
jim
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Beverly & Jim
Sebring, Florida
1991 T-2363 Solaris
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06-07-2011, 06:58 PM
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#5
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Senior Member
Join Date: Apr 2007
Location: New York
Posts: 1,846
SUN #264
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You are correct. Battery switch on for charging while towing.
If wired properly, the breakaway circuit should be direct wired to the battery and not affected by the on/off switch. That eliminates any potential for "accidentally" turning off the breakaway system.
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'12 F250 4x4 Super Duty PowerStroke 6.7 diesel
2011 to present: '11 Cougar 326MKS
1999 to 2011: '99 Sunline T-2453
SUN264 * Amateur Radio kd2iat monitoring 146.52
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06-07-2011, 09:22 PM
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#6
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Moderator
Join Date: Nov 2006
Location: Ohio
Posts: 12,656
SUN #89
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On my 2004 the breakaway switch is direct on the upstream side of the on/off disconnect. The only way to not have the emerg breakaway switch hot is to pull the cables off the battery.
If you want the battery to charge while towing then you need the switch on.
I always travel with the switch on. However if you left it off it will not really hurt anything.
Jim and Mary Jane, your 2005 should be made like my 2004 as 2004 was the model year the disconnect switch started showing up
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
Google Custom Search For Sunline Owners Club
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06-07-2011, 09:27 PM
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#7
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Moderator
Join Date: Nov 2006
Location: Ohio
Posts: 12,656
SUN #89
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Here is what a 2004 "non slide" camper junction box looks like inside. You can see the 2 little black breakaway switch wire head towards the on/off disconnect switch however one of them, the power lead, sneaks behind the switch to land the hot wire on the upstream terminal of that switch which is then direct to the battery
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
Google Custom Search For Sunline Owners Club
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06-08-2011, 05:46 PM
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#8
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Senior Member
Join Date: Dec 2008
Location: Missouri
Posts: 190
SUN #763
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Thanks everyone. Boy this forum is great.  I have learned so much from it.
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Jim, Mary Jane and Lord Bentley (Beagle)
2005 Sunline T-1950 (Sold)
2006 Sunline T-2499 (Sold)
2014 Ford F150 Super Crew 4x4 Eco Boost
2012 Holiday Rambler Vacationer Motorhome
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