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09-20-2017, 07:47 PM
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#21
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Who Dares, Wins
Join Date: May 2012
Location: Chester County, PA
Posts: 7,063
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And I was always poo pooed for unplugging my truck at night to avoid a dead battery when spending the night at a rest stop.. Guess I was not to far off.
__________________
Pat, Jen, Heather & Sapphire, the head mouser.
2015 Chevy HD D-Max
2022 Impression 315MB
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09-20-2017, 08:13 PM
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#22
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Senior Member
Join Date: Jul 2017
Location: California
Posts: 7,616
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I just bought my trailer. I will installing an ACR(Voltage sensitive relay) on the input to my trailer to prevent this from occurring.
https://www.bluesea.com/products/760..._12_24V_DC_65A
I have one of these on each of my boats. The smaller one linked here is for my pontoon and the bigger one that is 120A for my Wellcraft.
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09-20-2017, 10:35 PM
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#24
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Senior Member
Join Date: Jun 2012
Posts: 10,907
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You can just install a relay under the hood that is energized by a switched power wire in the TV. When it closes, it connects the TV to the 7-pin's aux power wire. Shut off the ignition and it opens the relay contacts and disconnects the TT from the TV. $7.50 to $15 depending on what relay you buy. Most any auto parts store carries them, or here's one:
https://www.amazon.com/Auto-Truck-Re.../dp/B007JPPQH6
__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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09-21-2017, 06:02 PM
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#25
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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My 3500 Silverado has two batteries and one is just used for starting the truck. It's supposed to be run down protecting or that's what it said in the manual
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09-21-2017, 07:39 PM
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#26
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Senior Member
Join Date: Aug 2016
Posts: 1,834
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Quote:
Originally Posted by spock123
My 3500 Silverado has two batteries and one is just used for starting the truck. It's supposed to be run down protecting or that's what it said in the manual
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Really? What year? My 2014 says no such thing (unless I missed it, slim as that might be).
I ran both flat with a GPS on accident a few weeks ago.
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09-21-2017, 08:02 PM
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#27
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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I have a 2012 Silverado 3500 and I have left my Garmin on overnight plus my TST on. I think after a time the truck shuts down the the battery drain. I can't run down my starter battery from things that are left plugged in.
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09-21-2017, 08:45 PM
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#28
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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I think I saw it in my manual or or on the window sticker which I still have
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09-21-2017, 10:24 PM
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#29
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Senior Member
Join Date: Aug 2016
Posts: 1,834
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Quote:
Originally Posted by spock123
I have a 2012 Silverado 3500 and I have left my Garmin on overnight plus my TST on. I think after a time the truck shuts down the the battery drain. I can't run down my starter battery from things that are left plugged in.
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I had tapped an always hot in the overhead for my GPS and furrion backup camera. I'm unsure of my meter, but it seemed the GPS was pulling a couple amps (can't be right, but obviously was too much).
I have an inductive charger and Bluetooth obd on all the time. Gps and screen are now keyed.
I don't think it does the load shedding like that, but can't prove it. Would be nice to know for sure. I obviously want using the auxiliary power port (cigarette lighter).
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09-22-2017, 07:47 AM
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#30
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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I plug my Garmin and TST in the cigarette lighter, I actually have a three way plug. 
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09-22-2017, 07:48 AM
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#31
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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I have no idea why two pictures were sent
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09-22-2017, 09:58 AM
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#32
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Senior Member
Join Date: Jul 2017
Location: California
Posts: 7,616
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This is what the manual says:
Battery Rundown Protection/Inadvertent Power
The body control module (BCM) inadvertent power supply voltage circuit provides battery positive voltage to all of the interior reading lamps, visor vanity mirror lamps, and cargo lamps if equipped. In the event that any of these lamps were to remain illuminated for a period of more than 10 minutes with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power supply voltage circuit to prevent a total battery discharge condition.
Doesn't do anything for the power to the 7 pin connector or the cigarette lighter outputs.
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09-22-2017, 12:01 PM
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#33
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Senior Member
Join Date: Aug 2016
Posts: 1,834
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Interesting. Mines a 2014 Sierra 2500 duramax. I need to see if mine has that.
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09-22-2017, 12:02 PM
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#34
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Senior Member
Join Date: Aug 2016
Posts: 1,834
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Had a .PDF, searched rundown and inadvertent. Negatory. Huh.
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09-22-2017, 01:04 PM
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#35
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Senior Member
Join Date: Jun 2012
Posts: 10,907
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Quote:
Originally Posted by aeblank
Had a .PDF, searched rundown and inadvertent. Negatory. Huh.
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Look for Battery Power Protection and Retained Accessory Power. (Actually, I just searched for "10 minutes.")
Lots of discussion in my 2016 Silverado 2500HD manual. My 2011 and 2017 Traverses do the same thing. I'm guessing it's a pretty standard GM thing.
But as noted above, trailer aux power is not included.
__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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09-22-2017, 01:12 PM
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#36
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Senior Member
Join Date: Apr 2017
Posts: 645
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Quote:
Originally Posted by Crusadernoob
Yup, unplugged on night in Albuquerque, as always I asked the DW to remind me, needless to say we were in a hurry and drove off with no lights! Lucky for us we had planned a first thing stop at Wally World 2 miles down the road.
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No lights is one thing; Not stopping in the distance you expect is a whole nother level of pucker factor.
__________________
-- My wife complains I never listen to her. Or something like that.
2017 Heritage Glen 368RLHBK Limited
2017 Ram 3500 4x4 Crew, 6.7 Cummins
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09-22-2017, 08:49 PM
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#37
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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Quote:
Originally Posted by m35a2
No lights is one thing; Not stopping in the distance you expect is a whole nother level of pucker factor.
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How did that happen
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09-23-2017, 10:28 AM
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#38
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Senior Member
Join Date: Jul 2016
Posts: 320
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Quote:
Originally Posted by rockfordroo
Look for Battery Power Protection and Retained Accessory Power. (Actually, I just searched for "10 minutes.")
Lots of discussion in my 2016 Silverado 2500HD manual. My 2011 and 2017 Traverses do the same thing. I'm guessing it's a pretty standard GM thing.
But as noted above, trailer aux power is not included.
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Pretty much standard on all vehicles in the last number of years. But, it does not include the cigarette lighter or any "hot" connection.
Mark
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