3 wire, 208v service. 30 amp breakers.

The machine will run briefly, but will ultimately trip the breaker. Unfortunately, I have no witnessed this myself (it is my mother's machine, and it has happened to her on two consecutive occasions).

While poking around inside with the ohmmeter, I found a short to ground from a wire that I traced back to the timer motor. The short was only 1.012 megohms, but I thought that might be enough leakage to throw the breaker over time. So I purchased a replacement timer here on APP, but the replacement timer has the exact same 1.012 megohm leak to ground, so I am assuming that this is not a problem, but exactly how it is supposed to be.

So, I continued to poke around, and I found a dead short to ground from the black wire on the push-to-start switch. The switch itself is okay, as the short persisted when the conductor was disconnected from the switch. The wire then splits - blue to the door switch and black down to the drive motor. I disconnected the door switch and the short persisted, so I am assuming that the door switch is okay and that the problem is in the drive motor. However, the drive motor is hidden behind the chassis, and I did not have time to dig any deeper than that. And to be honest, I'm not sure I would know what to check even when I got that far.

That's where I need some guidance. I've already gone down the wrong road once. Can someone have a look at the wiring diagram and suggest what I should check next? I know that this problem is pretty simple, but I am at a loss as to where to go from here.

Thanks in advance for any suggestions and advice!

- O.P.