We have a 2006 9660 STS. We have had issues with the feed accelerator light/buzzer coming on. There is nothing wrong with the feed accelerator. The issue is when you slow the rpm's up with the header engaged, all the lights go on and the buzzer sounds like it should. But when you then speed the machine up just the feed accelerator light stays on with the buzzer on. And it stays on, and it stays on. You can shut the machine down and restart everything back up, but that one light and buzzer stay on. Ok.... so no one likes to cut wheat with this buzzer going off!!! That will drive a guy nuts after 30 min. I have replaced the sensor which is on the left hand side of the machine. No luck. I have tried to adjust the sensor so it is the right distance from the shaft. No luck. We have had the electronic board with all the lights and buzzer replaced. No luck and a lot of money out of our pocket. Has anyone had this problem? Does anyone know of a solution to this problem? Thanks in advance for any thoughts!