Help, 1st of all I have a ceiling fan w/light fixture. The pull chain broke off from the inside, I've replaced the switch. At first the light wouldn't come on either so I switched the black wires. The wire colors are 1 red, 2 blacks & a 1 greenThe light works again but all the ceiling fan does is hum. The connections say L 1, 2 & 3 (4 wires) I'm not sure what to do now as I can't find the name brand of the fan (was already in when I purchased the property). It's humming and that's about all. PS this is the 2nd switch purchased.