My ceiling fan light works fine with my single pull switch but I want to change it to a dimmer. There are 2 ceiling fan wires for light (blue, white). I bought a dimmer pull-chain which has 3 wires (red, blue, and longer black). The light fixture has 2 wires (white, black). I'm currently using a single pull ON/OFF pull chain (2 black wires). For the changeover what goes where or is this not possible?