Battery?
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Senior User
Joined: Jun 2014
Posts: 446
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From: Denton, TX
Battery?
I am in need of a battery that will fit in a 47. Where is the best place to get one?
It doesn't have to be any specific brand, just one that will work at a decent price.
It doesn't have to be any specific brand, just one that will work at a decent price.
Mountain Pass
Joined: Dec 2011
Posts: 187
Likes: 2
From: Oregon
Clean connections and heavy gauge battery cables are more important than the battery.
My 36 pickup only has room for a small battery under the floor board. That small battery works just as well in the pickup as a larger battery does in my 47 truck.
My only slow cranking problems have been related to bad connections (don't forget the ground strap) or a battery cable that is not a large enough gauge.
I agree with the other response, take measurements and buy whatever fits.
My 36 pickup only has room for a small battery under the floor board. That small battery works just as well in the pickup as a larger battery does in my 47 truck.
My only slow cranking problems have been related to bad connections (don't forget the ground strap) or a battery cable that is not a large enough gauge.
I agree with the other response, take measurements and buy whatever fits.
Thread Starter
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Senior User
Joined: Jun 2014
Posts: 446
Likes: 0
From: Denton, TX
So a regular 12 volt battery will work without modification to the electrical system?
I read somewhere that old trucks used a 6 volt electrical system. Is that not true? If so, do I need a special battery?
I am new to vehicles this old. Haven't picked the truck up yet, just trying to get a nude of what'll be needed when I try to get her running.
I read somewhere that old trucks used a 6 volt electrical system. Is that not true? If so, do I need a special battery?
I am new to vehicles this old. Haven't picked the truck up yet, just trying to get a nude of what'll be needed when I try to get her running.
Mountain Pass
Joined: Dec 2011
Posts: 187
Likes: 2
From: Oregon
The old trucks used 6 volt positive ground systems. The positive battery terminal is connected to the frame.
If your 47 is original, then it is 6 volt positive ground and will need a 6 volt battery. It is possible that some previous owner converted it to 12 volts negative ground. If so, you would obviously need a 12 volt battery and its minus terminal would be connected to the frame.
When I said just use whatever battery fits the space, I meant that it must be the correct voltage (6 or possibly 12). Since you don't have the truck yet, you shouldn't buy a battery until you get the truck and determine what voltage battery you need, and how big of a space you have available.
How to tell if it has been converted to 12 volts? Since you are unfamiliar with the truck the easiest method would be to look at the voltage rating on one of the headlights, or one of the tail lights.
Tom
If your 47 is original, then it is 6 volt positive ground and will need a 6 volt battery. It is possible that some previous owner converted it to 12 volts negative ground. If so, you would obviously need a 12 volt battery and its minus terminal would be connected to the frame.
When I said just use whatever battery fits the space, I meant that it must be the correct voltage (6 or possibly 12). Since you don't have the truck yet, you shouldn't buy a battery until you get the truck and determine what voltage battery you need, and how big of a space you have available.
How to tell if it has been converted to 12 volts? Since you are unfamiliar with the truck the easiest method would be to look at the voltage rating on one of the headlights, or one of the tail lights.
Tom
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