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JMOR 12-26-2012 16:31:50 72.181.173.171 Report to Moderator	Animal said: (quoted from post at 20:24:02 12/26/12) This is on a farmall M that I am redoing. It is converted to 12 volt negative ground. I got a repro stock coil from Steiners for this thing and it was recomended to me from their service techs to have a balast resistor in the line going to it. I am running about four feet of 10 gauge wire from the resistor to the coil and it sure has a weak spark from the coil to the plugs. I ran a jumper from the starter to the plus side of the coil along with the low voltage wire and it will fire real good as long as the starter is engauged, when I let up on the starter the motor will not hit. I am thinking that I have to long of a run on small wire going to the coil. What do you fellas that really know your electricity think. I value your knowledge alot on this board. Thanks in advance, Animal.. 4 feet of 10GA wire is definitely not your problem! I first suspect that your resistor has too great of a resistance. Do you know what value it is? Do you have an amp meter capable of measuring about 4 amperes? Yes, the light dims because the resistor is doing what resistors do when current flows through them, that is, they drop voltage. This post was edited by JMOR at 16:33:47 12/26/12. [Reply]   [No Email]
Animal 12-26-2012 17:06:09 76.0.45.68 Report to Moderator	Re: I need some info from you sparkmasters.... in reply to JMOR, 12-26-2012 16:31:50   No sir I sure do not know what its value is.   [Reply]  [No Email]
old 12-26-2012 18:37:09 209.86.226.34 Report to Moderator	Re: I need some info from you sparkmasters.... in reply to Animal, 12-26-2012 17:06:09   Last time I did a 12 volt conversion on a Farmall and used the factory 6 volt coil I used an O'Reilly's VR-1 ballast resister. Cost around $5 and it works very well on any tractor I have done and I have done a good many. Plus it can be mounted so as to be hidden if you have a hole some place to mount it at   [Reply]  [No Email]