Check to see if you have power to the motor when the washer should be agitating.
Put one meter probe on the white wire at the motor. Take the other probe and check for voltage on the orange wire and black wire at the motor.
Do you have any voltage to the motor?
Section 5 - Page 3 in the service manual has the wiring diagram for your model washer.
If you don't have voltage to the motor you can leave one meter probe on the white wire and trace back from the orange wire and black wire to see were you have lost the voltage. Looking at the diagram you will be tracing it back to the agitate speed switch then to the timer.
If you find you have no voltage coming out of the timer going to the motor then the timer is what's causing the trouble.
Did you try the different agitate speeds?
Something you can wiggle the timer knobs back and fourth on a bad timer to get the timer to kick in for a second.
Here is the timer for your washer.