(800) 853-2651
SHOP NOW

Two 12 Volts Wiring Instructions

Our Phone System is Down!

Please use the Contact us Form

We are working to resolve the issue ASAP! Thanks for your patience!

B

Bobl1958

Well-known Member
Just want to make sure I am correct. I want to wire 2, 12 Volt Batteries together to run a 12 Volt Starter. This is on my Case 830. I want to have plenty of spin power.

The question is do I go:
First Battery-
Neg to Ground and Positive to Negative on the Second Battery,

Second Battery-
Neg to Positive on First Battery, and Positive to Starter

In other words, do the Neg and Pos posts get wired together? I want 2, 12 volt batteries but not a 24 volt system. Thanks for the help - Bob
 
"First Battery-
Neg to Ground and Positive to Negative on the Second Battery,

Second Battery-
Neg to Positive on First Battery, and Positive to Starter

In other words, do the Neg and Pos posts get wired together? I want 2, 12 volt batteries but not a 24 volt system."

That is a SERIES connection and will give you 24 Volts.



Connect the first battery to ground and the starter switch or solenoid as if it were the only battery.

Then, connect the second battery the same way, putting the batteries in PARALLEL.
 
You want a parallel circuit.

Both positives tied together and to the solenoid post.

Then both negatives together and to the chassis ground.
 
(quoted from post at 16:12:30 03/15/20) You want a parallel circuit.

Both positives tied together and to the solenoid post.

Then both negatives together and to the chassis ground.
Click to expand...

I worded my reply just a bit differently, in case this is a (+) ground system.
 
I just did this on my 830 about a year ago. Neg to Neg, Pos to Pos. I used two group 31 batteries and had the auto parts store make two cable assemblies for me. One Neg and one Pos. The cables have two swedged fittings for the batteries with an eyelet for the ground or starter in the case of the positive cable. That tractor never turned over so fast. Of course, the whole set-up wasn't cheap but works great and looks like an OEM job.
 
these tractors came out with 2 6 volt battery's wired in series to make 12 volts. one good 900-1000 amp cranking battery is lots to start them. but if you want 2 12 volts then wire in parallel as said here. they are only a 4 cyl engine.
 
I concur with Bob & Steve. POS to POS to starter solenoid and NEG to NEG to ground. That will give you 12 VDC. This is known as a parallel circuit. Your description would give you 24 VDC and is known as a series circuit. Not what you want to do on a 12 VDC tractor. You will fry voltage sensitive electronics. ie radios, coils, monitors, etc.
 
You want 12 NOT 24 Volts, so connect the two batteries in PARALLEL... + of one to + of other,,,,,,,,,,,- of one to - of other.

The two twelves in parallel still gives you 12 volts BUT THE AVAILABLE AMPS INTO YOUR STARTER CAN DOUBLE for improved cranking capacity. Example if each battery was say 500 Cold Cranking Amps (CCA), two connected in parallel yields 1000 CCA. Anytime multiple batteries are used its best if they are a matched set of identical spec batteries, even the same age is good.

John T
 
Hello bob,

Wiring picture for 2 12 volts batteries. Retaining 12 volts, doubling the amps,

Guido
cvphoto8497.jpg
 
At the risk of being redundant, positive to positive, and negative to negative--the same as if you were hooking up jumper cables.

I did that years ago on a Chevy Impala I used to own. That thing would start no matter how cold it was! And if you gave someone else a jump start off it, the other car would just about lift off the ground!
 
You must log in or register to reply here.

Similar threads

grandpa Love
Alternator issues
Replies
14
Views
803
Rich'sToys
R
S
1964 JD 4020 diesel 12 conversion not starting problem
Replies
4
Views
290
8850dave
8
J
Starting 8N problems
Replies
5
Views
309
Jim Phillip
J
M
SWD9 battery ground
Replies
7
Views
353
John T
J
P
300 u 6 to 12 v conversion update problem
2
Replies
28
Views
1K
Paul 300 U
P
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top