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Farmall & IHC Tractors Discussion Board

Re: Farmall H Battery Installed backwards


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Posted by Janicholson on January 15, 2009 at 16:43:34 from (64.83.227.252):

In Reply to: Re: Farmall H Battery Installed backwards posted by Antgre on January 15, 2009 at 14:27:00:

THe answer is that a solid state cutout relay can be made for cheap. take a diode pack from a discarded alternator. Remove a pair of diodes from one set as a block (they are usually mounted on a heat sink in groups of three, so just use two by cutting the heat sink between an end one) Test them to see which way they pass current. (they are usually unmarked) You want to strip out the guts of your old cutout relay and leave the two leads going in and the base and lid with screw. Attach the diodes with the leads attached together so that the leads attach to one terminal of the cutout and the base block to the other. Use good solid methods of attachment, and nothing should be touching or grounded to the can of the relay. The leads should be attached so the diode passes voltage from the gen to the battery. A test light should not light when the Arm terminal is connected to the light, the other lead on the light grounded, and the bat lead connected to the bat Neg terminal. This setup uses two diodes to be sharing the gen output, and will work forever. JimN


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