260E problem

Allright, here's one for the experts :

The washer fluid doesnt spray so I've checked the washer pump. checks out OK. Next I checked all the relays, the silver ones behind the fuses in the fuse box. They're all operational.
Question is which relay pertains to the washer fluid pump ? More over is there a way to find out if the inside switch for the washer spray is bad ? the wipers, headlights, blinkers all work.

Thanks.