I had this exact same problem. I resolved it by tipping the washing machine up so I could get at the bottom. Once under there I could see a black rubber waste pipe connected to the drum with a jubilee clip. After unscrewing the clip and removing the pipe I found the bra wire hanging out the hole the pipe had been attached to.
Undoing the jubilee clip needed a T-20 star shaped screwdriver bit. (A cross head screwdriver may work here if you are very careful)
Martin G. Brown, February 2009