The light for the door lock is the only thing that lights up on the control panel. When pushing any option buttons, it flashes, but the option and the cycle buttons do not light up, change or start. All the connections are intact with no sign of damage. Any suggestions on which part to replace? Thanks.
Your model number is missing the last digit.
Also I think it is KUDI01ILB?
Note the use of 1, I and L the people at Kitchen Aide seem to enjoy confusing everybody.
Here is a tech sheet. It is for a KUDI01ILB0 so am not sure if it will match your unit
http://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%208530866.pdf
If by door lock you mean control lock then perhaps it just needs resetting.