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Dual Battery setup

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Old Jan 15, 2010 | 11:16 PM
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Dual Battery setup

Is there a good thread allready posted for a dual battery setup?
I just had a camper given to me and think some re-wiring is in order. The dual battery would help for the camper as well as the winch.
 
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Old Jan 16, 2010 | 12:19 AM
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First off, what year? engine?
 
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Old Jan 16, 2010 | 12:36 AM
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Originally Posted by Growl60
First off, what year? engine?
1990 f250HD, 460, 5sp ZF no AC.
 
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Old Jan 16, 2010 | 12:42 AM
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Go take a look at any '83-'94 Ford diesel truck at your local junkyard, then grab the driver-side battery tray off it and wire up the batteries just like the diesel was done - both positive terminals hooked up together and to the starter relay on the fender (or directly to the alternator charging cable), both negative terminals wired to the engine block. If you don't have a 3G alternator yet, now's the time to install one. I have a 130amp 3G charging the passenger-side battery (and from there the driver-side one too) directly through a 1/0 Welding cable and a 175mp MegaFuse, the starter relay is powered through a very short 4-gauge amplifier cable, I got enough lights on the truck to make the alternator darn near glow from heating up and the big-cable setup works great for me.
 
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Old Jan 16, 2010 | 09:22 AM
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Originally Posted by M.L.S.C.
Go take a look at any '83-'94 Ford diesel truck at your local junkyard, then grab the driver-side battery tray off it and wire up the batteries just like the diesel was done - both positive terminals hooked up together and to the starter relay on the fender (or directly to the alternator charging cable), both negative terminals wired to the engine block. If you don't have a 3G alternator yet, now's the time to install one. I have a 130amp 3G charging the passenger-side battery (and from there the driver-side one too) directly through a 1/0 Welding cable and a 175mp MegaFuse, the starter relay is powered through a very short 4-gauge amplifier cable, I got enough lights on the truck to make the alternator darn near glow from heating up and the big-cable setup works great for me.
I was hoping for more of an isolated dual setup so that if I kill one battery with the camper/winch, I always have power in the other. Maybe your suggestion would work that way and I just dont know any better. LOL
 
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Old Jan 16, 2010 | 09:31 AM
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https://www.ford-trucks.com/forums/9...d-battery.html have a read right the way through this thread. Some great info, including wiring diagram.
 
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Old Jan 16, 2010 | 09:45 AM
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Originally Posted by Lazy K
https://www.ford-trucks.com/forums/9...d-battery.html have a read right the way through this thread. Some great info, including wiring diagram.

Good stuff! Just what I was looking for! Cheers!
 
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Old Jan 16, 2010 | 03:33 PM
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Originally Posted by jrodimus
I was hoping for more of an isolated dual setup so that if I kill one battery with the camper/winch, I always have power in the other. Maybe your suggestion would work that way and I just dont know any better. LOL
I see, well with the huge amounts my diesel is drawing at startup I have to have two batteries in parallel all the time, your situation tho would definitely benefit from having a battery isolator of some sort. However, as mentioned in the other thread, if you go with a relay-type isolator make sure the relay is of the continuous-duty type, the regular starter relay that goes on the fender ain't continuous duty and so cannot handle high currents for prolonged periods of time.
 
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Old Jan 16, 2010 | 07:18 PM
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I will certianly use a different relay. Thanks for the post.
 
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