Fan swith in harbor breeze 3-speed ceiling fan requires replacement. I purchase a new 3-speed fan switch. What is the correct connecting for the wires. Fan Switch L, 1, 2, 3 / Wire color code; Black Red, Yellow and purple.

How was the old switch connected?

http://www.ceiling-fans-n-more.com/ceiling-fan-pullchain-replacement-and-repair.php

When removed, Old switch was in pieces. All wire connections were unattached.

LB

Black is most likely L, you will have to try different combinations of the other wires until it works.