Headlight switch knob replacement

LOL some people did not read. Sorry I have no help. The knobs were not designed to remove. Not terribly sure just how you do that. I would try making yourself some scrap metal (aluminum or coper) vise "soft jaws" and clamp the shaft carefully in them so you don't damage the stem. Leave the knob "away" from the end of the vise jaws say, 3/8" or so. Put a small end wrench, 3/8" etc straddle of the shaft, and see if you can break/ pry the knob loose. You might also try putting the knob "up" in the vise and chisel the top enough to start to break the knob. Of course you'll have to epoxy the "new" knob back on