I think my pump might be dead......

[matt4x4]

Thanks for the insight Poconos - I'm used to dealing with DC motors, so brushes are what I'm used to, either way, it's a dirty contact related issue, not a worn out scenario.
What I find works well for cleaning any type of contact is a variety of erasers.
If you're dealing with circuit board contacts such as PC cards, the red type of eraser found on the end of a pencil is best, it's not too abbarsive, buff the part after erasing with a cloth to remove the rubbery film it it leaves behind. For contacts that can take a bit more "abuse", the blue gritty ink erasers work really well, they're like a fine sandpaper. What's nice is erasers don't take off a whole lot of the coating, just enough to get things like new again without reducing the lifespan of the part significantly.

[Poconos]

The eraser trick works well for card edge connectors but the switch contacts are too close together. I posted a pic in the thread I referenced earlier in post #5 of this thread. Back end of a Hayward pump motor. A cheap set of jewlers files will work fine. Otherwise some 400 grit wet-or-dry sandpaper, available at auto stores, works well. Again, you don't need to grind any material off. Cut a strip of sandpaper, double it up as in double-sided, and pull it through a couple times with slight pressure on the contacts, and that should fix it.
Al