Remove the two screws on each side of the plastic console with a quarter inch hex or Phillips bit.

Remove the four screws holding the metal panel behind the console and lift the panel off.

Refer to the schematic stored here for terminal labels and timer contact points.

Use the multimeter on continuity or ohms to test the correct timer contacts while rotating the knob to a heat setting.

If no continuity is found on the proper contacts at any setting, replace the timer.

Inspect the dial and shaft for damage if the knob fails to rotate the timer internally.