spend a couple of quid in halfords and buy two (probably have to get more than you need) male amp tags, assuming you have a bedside lamp take off the plug and crimp connectors to live and neutral.
with washer disconnected from supply connect up the lamp to the two female connectors you took off the pump, wrap some insulation tape round connector.
put machine onto a drain program, if the lamp lights power is going to the pump, if not it could be pump or blockage (check waste spigot and if you can blow through discharge pipe)