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#1 |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,866
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Explain auxilary battery purpose to me
So I have a C30 ex motor home that has the auxiliary battery. Can you explain how its wired into the system and what exactly is the use. When you use the electrically powered devices in a motor home my guess is they feed off the extra battery some how. Thanks for any insights on how this system works.
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#2 |
Registered User
Join Date: Oct 2009
Location: canton ga
Posts: 12,728
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Re: Explain auxilary battery purpose to me
Im interested in this one .
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#3 |
Senior Member
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Location: TN.
Posts: 8,102
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Re: Explain auxilary battery purpose to me
CG
My Grandpa's truck which is long gone was wired like that. It was a 71 Custom camper/20. He had a in the bed camper the we would load in the bed and go to Gatlinburg TN Here is the 2 pics I have of the truck. The two 12 volt battery's are wired parallel which keeps the system running on 12 volts and are wired so the Alternator will charge both battery's. The one battery is isolated so that only power is drain from it to use the lights or whatever else in the camper part of the truck.
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#4 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Simply put.
The main battery which I call the normal battery is for cranking the truck and running the normal stuff in a regular truck. The second battery runs all the camper electrical stuff normally. Now if you have it hooked up like it's suppose to be you can charge them both while the motor is running are if you need to you can use either one to crank the truck are vise versa. ![]()
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#5 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,963
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Re: Explain auxilary battery purpose to me
What they said. Here's some additional info:
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#6 |
Registered User
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Location: Victoria, B.C
Posts: 3,794
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Re: Explain auxilary battery purpose to me
Great post Jocko....very interesting and helpful!
I've always like the idea of having the secondary battery system...even in my 1/2 ton, which I use to pull a small travel trailer from time to time. Not that I have a dual battery set up....but I'd like one. In the meantime, I've mounted a second battery in the trailer and isolated it...but it doesn't get charged during driving...at least not yet. all good Coley
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....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 |
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#7 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,403
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Re: Explain auxilary battery purpose to me
Since I don't have one, but based on the information above, the auxiliary battery would be a deep drain version. They aren't good for use as a starter battery for an engine, at least more than a few times. I have a pair of deep drain batteries on my travel trailer. They are switched from under the hood so that while dry camping the trailer doesn't discharge the truck battery, but the trailer batteries can be charged while driving the truck. So, if the trailer batteries go dead from over use, the truck battery will start the truck so that we can leave the campground...if we were even in a campground. Sometimes we camp out in the middle of nowhere. I have a portable generator as a backup, in case I forget to flip that switch...
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#8 |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,866
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Re: Explain auxilary battery purpose to me
Good info. I knew they charged together but was unsure how if they charged together how come they didn’t discharge together.
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#9 |
Special Order
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Location: Mt Airy, MD
Posts: 85,859
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Re: Explain auxilary battery purpose to me
The key to this system is a battery "isolator" for directing what is hooked up to what while charging or drawing on the system.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#10 |
Registered User
Join Date: Apr 2003
Location: NB
Posts: 3,367
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Re: Explain auxilary battery purpose to me
Great info. I want to find a second tray to hold another battery for my 12000 winch. Pull the trees out to the build site. And pull the truck out when I get it stuck
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1968 Chevy C10 307 3ott fleetside 1967 Chevy C/10 V8, 3spd, fleetside lwb.Sold 1967 Chev C/10 step, 383, M21. SOLD |
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#11 |
Registered User
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Location: Victoria, B.C
Posts: 3,794
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Re: Explain auxilary battery purpose to me
Does anyone have any pics and references to these factory GM battery 'isolators'?
I think I might have one, but I'm keen to see what the standard/stock ones look like. Coley
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....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 |
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#12 | |
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Re: Explain auxilary battery purpose to me
Quote:
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#13 | |
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Join Date: Oct 2016
Location: Dallas Texas
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Re: Explain auxilary battery purpose to me
Quote:
In this case, what charging setup changes are required? Any pictures? -klb
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#14 | |
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Location: Scottsdale, AZ
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Re: Explain auxilary battery purpose to me
Quote:
Here's my setup. I wire the alt through a submersible 200amp breaker to the battery pos using #4. I ground the alt to block with a 10 guage, and also ground the alt to the battery with #2. I wire the pos to the winch solenoid with #4. I ground the winch body to the battery with #2 and the small ground as per install instructions back to the solenoid. All the other power wires on the winch running to and fro the solenoid are #4. I only have one Walmart Everstart 700 CAA, but I am adding a second battery soon, been dragging my feet! I have run the winch a few times with no issues. ![]() j
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#15 | |
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Location: Scottsdale, AZ
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Re: Explain auxilary battery purpose to me
Quote:
One other note. If I had an auxiliary setup, I would wire the winch to the starter battey, and have that battery fed from alt. ![]() j
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#16 |
Registered User
Join Date: Dec 2009
Location: El Dorado Ca
Posts: 3,374
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Re: Explain auxilary battery purpose to me
the way the factory isolated the batteries was to use a constant duty solenoid,when the vehicle is running, the solenoid allows the spare battery to be charged , when the key is turned off the camper or trailer is drawing power from the spare battery only. for those of you that want to run a winch, you would only run the winch with the vehicle running anyway so not a need to have a second battery
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#17 |
Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: Explain auxilary battery purpose to me
From the schematic above the isolator appears to be just a HD relay. Perhaps the same part as a horn relay.
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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#18 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
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This is a thread on my ramp truck aux battery setup. Done the way I like it wired. Newer parts and it works great, I can turn the relay on/off from the cab. All the accessaries are relay feed from the contactor by a dash mounted switch also.
The solenoid is a 12v /400amp unit. I use these all the time in the golf cart's I build to run lights and stuff off the carts pack voltage of 36/48 volts. The thread: http://67-72chevytrucks.com/vboard/s...d.php?t=780350 My contactor are solenoid which ever you prefer to call it. ![]()
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#19 |
Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: Explain auxilary battery purpose to me
Those contactors appear to be a little pricey ~$75. I guess a horn relay would be too light duty. A Ford starter solenoid work?
I need to set something up for my car trailer battery.
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#20 | |
Registered User
Join Date: Jun 2008
Location: Moss Point,Ms.
Posts: 1,439
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Re: Explain auxilary battery purpose to me
Quote:
And,isolators(for charging batteries) are available aftermarket.I have 1 on each of 2 of my trucks. One is to charge the batteries on my travel trailer and the other is on my car hauler.They sense the lowest battery and charge that battery only. A large relay is needed to isolate or switch from one battery to another. Mike. ![]() |
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#21 | |
Senior Member
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Location: Scottsdale, AZ
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Re: Explain auxilary battery purpose to me
Quote:
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#22 |
Registered User
![]() Join Date: Oct 2011
Location: Victoria, B.C
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Re: Explain auxilary battery purpose to me
Does anyone have a pic of a stock/factory one mounted in original position?
Coley
__________________
....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 |
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#23 |
Moderator
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Re: Explain auxilary battery purpose to me
In my 72 K2500
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#24 | |
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Join Date: Jan 2013
Location: Eastern TN
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Re: Explain auxilary battery purpose to me
Quote:
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#25 |
Registered User
Join Date: Jan 2013
Location: Eastern TN
Posts: 1,921
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Re: Explain auxilary battery purpose to me
This is how I did my 72. Then on the winch lead I added a set of those quick connects that tow trucks use for there jumper cables. I want to use the winch I just plug it in. No chance of it draining the battery. I also have no issues running a 12k badlands winch (doubled up) for a good amount of time with the truck off. When the winch starts to slow down and strain from the voltage going down I just start the truck. During winching I lock the truck down in low range and first gear and hook a logging chain to the rear hitch and an anchor point. The factory parking brake doesnt do alot for a manual transmission in neutral. It sucks when you are pulling a tree out of the woods and the truck starts to go to it or towards the bank!
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