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Tractor Talk Discussion Forum

12 volt convert

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need help

09-16-2003 15:16:50




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I am converting a Ford 800 and JD 620 to 12 volt. (I know, shame-shame)any way, I need help with the wiring. On both tractors I have got the #1 wire jumped to the big post and then going to the amp guage then on to the battery. Then the #2 or "F" goes where? I have tried different places on the switch and still get nothing in the way of a charge. The alts. are good. I have had a few people tell me that I need a small light bulb or some kind of pressure switch in circut to open the alt. Is this true or what am I not doing right. Any help or preferably a drawing PLEASE!

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jake

09-17-2003 07:50:03




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 Re: 12 volt convert in reply to need help, 09-16-2003 15:16:50  
Check the link below, shows 12V conversion on Ford. Look under maintanance/wiring diagrams.



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Jon H

09-16-2003 17:01:47




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 Re: 12 volt convert in reply to need help, 09-16-2003 15:16:50  
The #2 regulator wire goes to the BAT stud on the alternator rear,this is where the regulator senses system voltage. The #1 regulator wire goes to 12Volt power that is live only when the ignition switch is on. If you hook it to the same ignition switch terminal that feeds the coil,you need a Diode to block or small light bulb to restrict return flow of power to the ignition switch and coil. My personal preference is to use a small light bulb,as replacements are readily avalible and it serves as a charge indicator.
Another method of feeding power to the #1 exciter wire is to use aan oil pressure switch wired to feed 12 volts to the alternator when the engine is running and has oil pressure.
Have you converted the tractors to negative ground? This must be done to use an alternator.

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