easiest way is to pull them out and have a look at them.
Theyre graphite blocks which transfer mains power to the copper segments of the motor They're quite cheap parts and easy to replace. Power off, drag machine out onto the floor, remove the back cover and locate the motor. May help if the machine is tilted at an angle or laid on its side. The brushes are at the other end of the motor from the drive pulley. The holders are plastic or bakelite and are generally held in with screws or plastic clips. Also, look at the copper segments they run on to check for burning or pitting.
Repair and service your own washing machine. Go to www.2ndwave.co.uk/manual.html
dannyboy, December 2008