[Grady Clay]

If the starter solenoid is sticky, normally you can still hear a “click” but no cranking.

Since the fuel pump is operating, you know you are getting power to the ignition switch. The starter contacts in the switch are still suspect.

I would get under the car and inspect the connections at the starter (and the transmission ground strap while you are there). After you are sure the starter connections are good, install a long jumper wire at the yellow starter wire. Bring that to the cockpit with a test light. Turn the ignition switch and see if you get power to the starter. If the test light comes on yet still no cranking then the problem is in the starter. If the test light doesn’t come on then the problem probably is in the ignition switch. You can confirm the starter function by connecting the jumper wire to the battery+.

Needless to say, take all the normal precautions when under the car with stable jack stands, front tires chocked both directions, a jack under the engine mount and a safety block under the rear of the pan.

Be careful around the starter as the battery is still connected. You may want to disconnect the battery ground while you connect your jumper wire.

There are several other possibilities but this simple test will confirm or eliminate this possible cause. The most aggravating situation is if it goes back to working Ok for no apparent reason.

Pardon my ignorance - what is MID9?

Best,
Grady