if the header isn't going down, you need to look at the mechanism on the left side of feederhouse on header going to the potentiometer. It should be updated to the rod kit if it still has the cable and spring. Your header isn't going down because it thinks it is hitting the ground. Check the rod running the length of the header. Check for dry mud, especially on the right end where the height indicator is. Make sure the header is not locked up for rigid position. Before we updated to the rod kit, the cable could turn the lever on the potentiometer around to the wrong side. The reason the left side goes all the way down is bad wiring, bad potentiometer, etc... assuming you can't fix it from the console by turning the level knob. Goodluck and ask away, try to be specific. Get an owners manual. They provide good info, along with a good local mechanic.