In Reply to: 9N coil posted by Les Leach on April 26, 2018 at 15:14:31:
Yes, there certainly are wiring diagrams and many other useful articles in our HOW-TO's forum. At the top of the NTC Home Page you will see a red menu bar with many other links to other forums. here is a quick link -see below -to get you there fast. You can save the document to your computer and print it out and take right to the barn/shop so it's handy when working on your 9N. Scroll down til you find your setup and go from there. If you have a 6-volt coil, you will need the original ballast resistor. If you have a 12-volt coil, you do not use the resistor. Many 12-volt jobs are done improperly but with JMOR's Wiring pictograms, he has put together every CORRECT way to wire these old N's. Do not deviate from what he has provided as it will most likely cause failure. Note also when doing a 12-volt changeover, that besides the generator being eliminated, the voltage regulator or round can cutout is taken out of the circuit as well. A 12-volt battery and an alternator means using a negative ground system. The original N's used a 6-volt/positive ground system. Feel free to red though the forums, download articles and manuals, and post as many questions you like.