I have a 2007 57 Fiesta ST non rain sensing wiper model, on the intermittent setting the wipers park randomly accross the screen inbetween wipes, I remember on Mk1 Focus you can swop the relays to cure this but it hasn't worked on the Fiesta. When the wipers move there's an audible relay type 'click' from high up above the pedal box/heater box area so I'm guessing the timer/relay is housed within the wiper motor and I'll have to replace it to cure this, can any Ford mechanics or auto electricians confirm this? Thanks in advance.