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Farmall & IHC Tractors Discussion Board

Re: help with 12 volt conversion


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Posted by farmallhal on January 04, 2005 at 13:16:41 from (216.106.33.19):

In Reply to: Re: help with 12 volt conversion posted by Jeff Smith on January 04, 2005 at 12:11:08:

Jeff, Read what you wrote in the last post real clearly. If what you said in your last post is true I see that you have the wire from the 1 pin wired to the hot wire to the coil along with the wire from the 2 pin using a common wire nut. Is that what you really have? According to the wire diagram I used the wire from the 2 pin goes to the BAT terminal on the back of the alternator which runs to the the ammeter before the ignition switch. According to an email exchange I had with Bob Melville he stated the S pin on my Hitachi was the same as the 2 pin on the Delco 10SI and the S he believed stood for "sense" which was the function of the 2 pin. If you really have that 2 pin wired to ground or to the wire nut the alternator is probably not sensing a current draw and won't turn on. Do you have the wire (should be a 10 or 12 gauge wire) running from the alternator BAT terminal to the ammeter as shown in the diagram with it continueing on to the ignition switch? I would do it exactly like Bob's diagram except I still like the 10 ohm - 10 watt resistor in place of the light which Bob said was fine. Have you also changed the wires on the coil to run the hot wire from the ballast resistor to the coil + terminal and the coil - terminal to the distributor? The wire diagram I used was in an article writtem by Bob and titled "Step by Step 12-Volt Conversion" which uses a wire diagram for a Super M. This article is on this website at:

http://www.ytmag.com/articles/artint195.htm

Also in the fine print the warning light is to be rated at 200ma @ 12 volts. I couldn't fine a holder for a bulb mentioned in his article as what I was finding in available bulbs were like 20 - 30 ma @ 12 volts more like LED's or 10% of the current needed per his article. Hope this helps. Hal


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