Paulash

Hi, I have a 2002 2.0 Hdi Picasso which I have owned since new. Recently, the electrics have started failing one after the other. First was the AC, then the blower on the heater and now its the pump for the front and rear washers. All in the space of 1 month. Its not the fuses as I have checked these. Does anyone have any ideas. Are these components related somehow? Thanks