My old 3 position knob was worn out and only worked after I wiggled it like crazy. I really liked the lamp, I didn't want to change it. This solution was perfect! The push button switch works simply and easily. We understood each other without any problems. If your lamp cord doesn't have two-tone wiring, simply feel for the tabs. One strand is smooth, that's the hot wire that goes to the brass screw. The other should have little protrusions you can feel with your fingernail, this is the neutral