Make sure your meter is working on ohms by shorting the probes together- you should get zero or close to. Some meters have a handy beep
With power off: Below the overload relay dial (called FR/fuse relay) are the two contacts. One of those goes to KM1's coil. Trace it. Disconnect that one at the overload relay.
Measure with your ohmmeter from that wire you disconnected to 0 on the transformer and see if it's open. Should read about 60-75 ohms
Then, with the wire still disconnected, probe those two overload relay contacts and see if they are open. Let me know