That is what happened to mine I bet...
Well, I am one of the mallory users, my first pump lasted 6 mos with around 60k miles on it. I limped it along by taking a sledge and "tap"ing it to get it to come back on. I still have not sent it off to get fixed and bet if I replaced the brushes, that that might fix it. The second one has around 40k on it in the last 4-5 mos. It is still going strong. Do you have a part # on the brushes? Also where could I pick up a set?
Morph.