Bosch WAE32464GB/01 drum not turning

Would appreciate some advice, please, with my Bosch washing machine.

It’s an Exxcel 1600 Express – WAE32464GB/01

The drum won’t go round, either on normal wash, or on spin.

The machine takes on water, and drains, as normal.

The filter compartment is clear, and the impellor in it turns freely.

The belt is fine, and attached.

I took out the motor; the carbon brushes were worn down to less than 1cm. I replaced with generic brushes from eSpares, and re-fitted, but it still doesn’t work.

I believe it was making more noise than usual, in the week before it failed, possibly my imagination. That was last week. Has otherwise been fine, since new.

I can get a new motor from Bosch for £160, but of course I don’t want to do that if it might be something else.

I would like to test the motor with a multimeter, but am not sure what pins on the connector I should be testing, i.e. what continuity/resistances should be present between which pins, etc.

Any advice on motor testing, or any other troubleshooting I can do here, please?

thanks much indeed…