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Shane T Guest
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Posted: Fri Nov 23, 2012 9:18 am Post subject: I want to change from a 12v positive ground to a 12v negativ |
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I have a Allis Chalmers D15 series II with a 12v positive ground electrical system. What all do I have to do to change it to a negative ground electrical system? I have been told to swap the battery cables on the battery and to swap the two wires on the coil. Is that all I have to do? |
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Bob Bancroft Tractor Guru
Joined: 05 Mar 2009 Posts: 6994 Location: Aurora NY
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Posted: Fri Nov 23, 2012 9:28 am Post subject: Re: I want to change from a 12v positive ground to a 12v neg |
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You will also have to swap the wires on the ammeter, unless you want to read it backwards! |
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old Tractor Guru
Joined: 12 Mar 2000 Posts: 75201 Location: Lake of the Ozarks area of MO
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Posted: Fri Nov 23, 2012 9:29 am Post subject: Re: I want to change from a 12v positive ground to a 12v neg |
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First off why the heck do you want to change it??? There is no rime or reason to do so if it is working. Now if you just have to do so which as I said no rime or reason to do so you need to first figure out if you have a generator or an alternator. If you have a generator yes you switch the battery cables and the coil wires and then you polarize the generator system and your good to go. But again I will ask WHY????????????????????????????? |
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David G Tractor Guru
Joined: 11 Jan 2008 Posts: 20141
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Posted: Fri Nov 23, 2012 1:33 pm Post subject: Re: I want to change from a 12v positive ground to a 12v neg |
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You will need to repolarize generator before it will charge. |
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TractormanNC Long Time User
Joined: 29 Dec 2006 Posts: 1243
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Posted: Fri Nov 23, 2012 2:32 pm Post subject: Re: I want to change from a 12v positive ground to a 12v neg |
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He may be wanting to use some electronic equipment on or with the tractor and has to have negative ground for it to work. |
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Shane T Guest
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Posted: Fri Nov 23, 2012 5:58 pm Post subject: Re: I want to change from a 12v positive ground to a 12v neg |
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Thanks for your help guys. Have a great day. |
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Scoyt New User
Joined: 03 Jul 2009 Posts: 19
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Posted: Sat Nov 24, 2012 11:02 am Post subject: Re: I want to change from a 12v positive ground to a 12v neg |
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If the positive and negative are swapped, wouldn"t the starter turn backwards?
The reason I ask is because I also have a D15 Series II, and considering the same swap. |
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Bob Bancroft Tractor Guru
Joined: 05 Mar 2009 Posts: 6994 Location: Aurora NY
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Posted: Sat Nov 24, 2012 3:52 pm Post subject: Re: I want to change from a 12v positive ground to a 12v neg |
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No. I also have a D15II and I have switched it. I can't remember if I had to polarize it or not. |
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Scoyt New User
Joined: 03 Jul 2009 Posts: 19
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Posted: Sat Nov 24, 2012 6:30 pm Post subject: Re: I want to change from a 12v positive ground to a 12v neg |
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Ok, I just thought it may run backwards. Thanks. |
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Bill MO. New User
Joined: 22 Aug 2012 Posts: 11
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Posted: Thu Nov 29, 2012 5:35 pm Post subject: Re: I want to change from a 12v positive ground to a 12v neg |
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The starter doesn't care what the polarity is.
Bill B |
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