Thanks DGM - that sounds like it. Will check.

Thanks all. I tried your suggestion about raising the tailgate/ wiggling the LHS wires behind the hinge cover, but no joy. I realise I misled you by saying the wiper remained in 'Park' - actually it sticks at the extreme left position ('9 o'clock') but can be induced to restart by moving it past '10...

My rear wiper 'froze' at the '10 o'clock' angle (for the second time) this week. Last time it restarted itself a week later (!)- this time I moved it on manually this morning with the wiper switched on, and after a couple of degrees turning it completed the cycle by itself but then remained in the p...