Test for power at the connector you remove from the motor first, if you have no power here, you need to go back to the switch.

The screetching sound is most likely where water has got onto it which is what causes them to sieze and cause problems with resistor packs in the first place!

It may well be your motor has siezed and this is what you can smell (Assuming it's not an unrelated issue) although the fuse should blow!

Martin