Newbie here with little clue of water or electrics

Loving Bongo life and prepared to live with the issues of a 23 year old van
We have the Montegue Side conversion with a Reich tap and 12v submersible water pump
Changed the water at the weekend and the tap stopped working
On investigating, the tap still ‘clicks’, I assume this is the micro switch working but the water pump makes no noise
Looking at a few YouTube video’s the water pump should whirr when you turn the tap on right?
I’m suspecting this is the issue and will replace it
Just wanted peoples thoughts
Any help is appreciated in advance
Gareth