I will bet that you have the wiring wrong on the back of the key switch and light switch. It is easy to do if you have them both off at the same time because they both use wires that are the same color but are supposed to be separated.
Get a factory JD service manual an get the correct wiring diagram for your model and serial number. There are four different possible wiring setups on a JD 3020. If you used a an IT service manual the one they have in the book is for the later serial numbers only. I get one or two each year messed up because of using IT service manuals.
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Today's Featured Article - On the Road with Dave Gohl: Deere Departed Friend - by Dave Gohl. Have you ever had to part with a dear friend? It's not easy. If it's due to death, your feelings could be in disarray for days, months or even years. Even now after almost 4 years, I still miss my dad. I remember when I was a kid my dad sometimes would tuck my brother and I in at night and we would ask him questions about his childhood on the farm. To this day, it's some of the best stories I've ever heard. And now, I'm so glad that I asked those questions, and if I were a little smarter i
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