Electrical Questions? Ask an Electrician Online.
Welcome. My name is ***** ***** would be glad to assist.
Since you definitely have power for the timer, and all connections tight and clean, it appears that the motor has failed and needs replacing.
Quite common with the little motors to fail at some point and that stops the timer from turning the dial.
CLICK HERE to see a replacement.
Just depends on whether you prefer a whole new timer or to repair the one you have now.
Let me know anything further needed,