Here are your parts
Replacement parts for WHIRLPOOL KEYS750LQ1 29"electric Dryer | AppliancePartsPros.comHere is a wiring diagram
http://www.servicematters.com/docs/wiring/Wiring%20Sheet%20-%203406699.pdfNot sure where you measured for power across the motor but something does not sound correct (see below)
[COLOR="Blue"]As far as I can tell everything is supposed to be working, but it's not working. The new motor doesn't hum when I press start. The timer still clicks. The light doesn't come on inside when opened[/COLOR].
There are a couple conflicting things here.
If the light was working then either it is not getting power or it coincidentally blew the bulb.
Yet you say that the timer is clicking which indicates that it is getting power.
The light, timer motor and the main motor all get power from the same side of the line ( L1 to Neutral.
I would start by checking the power to the unit.
Try flipping the breaker off/on slowly a couple times, sometimes you can loose half the line without actually tripping the breaker.
If this does nothing, check the voltage at the plug
L1 to L2 should be 240 volts
L1 to Neutral and L2 to Neutral, both should be 120 volts.
If OK
Unplug the unit and check the wires at the terminal strip in the machine to make sure none are loose or burned out
If OK
Check the power at the terminal strip.
[COLOR="Red"]Be careful as 240 volts is lethal !!! [/COLOR]
If power is OK.
At the top of the list would be the thermal fuse on the blower (Item 6 in Section 3).
Unplug the unit, remove one wire from the fuse and check it with your meter, should be 0 ohms.
A down and dirty check is, unplug the unit, remove the wires from the fuse and short them together. Tape them up so they cannot short to the frame etc. Then plug the unit in and give it a tery.
If this fuse is blown clean/check your vent system as that is the most common cause of blowing this fuse.
If the fuse is OK.
Unplug the unit and check the individual components I the motor start circuit.
Be sure to unplug at least one side of any component you are checking. This prevents you from reading an alternate/parallel circuit path.
I usually put the timer to mid scale timed dry.
Your motor start path is
Neutral , Door Switch (normally open contacts) - Timer Switch 4 - motor's centrifugal switch - motor's Start and Main windings - Thermal Fuse - Push To Start Relay contacts - timer contacts BU to BK - L1
