I thought this was topical, given the weather...
Mk1 Fabia uses a circuitboard mounted relay to drive the wipers, which is great when it is working, but a little unfortunate when it wears out. The circuit board in question is in the Onboard Supply Control Unit, physically located above the accelerator pedal in RHD cars, clutch pedal in LHD (I guess). It tends to be known as the BCM (Body Control Module) in later cars, and is not the same as the Central Convenience Module (which does