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24v start 12v systems

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Bobby

06-05-2002 09:49:48

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I have a 1964 3020, deisel. Runs Great! Problem is all lights are blown out and I'm reading 24v at each hook up. Using a volt meter at the light switch and ignition as well, I see the same. Where is the problem?

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bobby

06-06-2002 05:08:08

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Re: 24v start 12v systems in reply to Bobby, 06-05-2002 09:49:48

I fixed the 12v/24v problem. Before purchasing this tractor the owner had the PTO repaired which required splitting the tractor.
When it was put back together the ground wire, from frame that should have been connected to the positive terminal post on left battery was on the negative. Changed it and all is well.

Thanks for responses!!!

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WTW

06-05-2002 11:51:50

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Re: 24v start 12v systems in reply to Bobby, 06-05-2002 09:49:48

Bobby, I may be able to help you, but need to know how and where you are checking for voltage with your volt meter when you are seeing 24 volt. There will be 12 and 24 volt present at both the key and light switch on these systems depending on where you place your volt meter leads. When checking for 12 volts (ALWAYS) use the frame as the ground side for 12 volt checks. The key and light switch have two common 12 volt lines to them. (two lines to each switch) One is 12 volt positive and the other 12 volt negative ground. Grounding one of your volt meter leads to the frame you should have 12 volt on each line, one positive and the other negative ground. If using a digital meter your volt meter will show a + on one wire when checking it and the other will show a - when checking it. If you have your meter test leads on each wire at a one of the switches you will see 24 volt (this is normal). If you do not have 12 volt when checking between the frame of tractor and one supply wire at a time your ground wire at your cross over battery cable connection on your battery is open. This wire is usually placed on the rear (negative post on the right battery. It will work on either battery as long as it is grounding the cross over battery cable between the two 12 volt batteries. If you find that this wire has failed and when reconnecting it fails again that means you have a 12 volt short to ground. I can help you with that also if that is what you find just post back with what information you have. Good Luck, Dave W.

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06-05-2002 11:48:56

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Re: 24v start 12v systems in reply to Bobby, 06-05-2002 09:49:48

There is probably a short in the starter. Is the fuse wire on the left battery still there?

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