Lil' Hoss is right, I would be slow to jump to "Good job Deere cheeping something up with less shielding".You could try installing a ferrite filter on your radio line to reduce some of the noise.https://www.networkworld.com/article/3198386/mobile-wireless/how-john-deere-developed-one-of-the-best-gps-locators-in-the-world.html