In Reply to: 1940 9N Electrical system posted by Robert Angney on January 12, 2020 at 20:25:38:
Your tractor did not come from the factory with lights. They were dealer add ons. No wiring harness that you buy is going to include wiring for the lights. Not to worry tho, just go to the how-to's at the top of this forum and then under electrical you will find JMOR's wiring diagrams.