Ah, she gives me interesting things sometimes.
Christmas eve, quite a bit of dust on windscreen, so flicked for the washer/wiper, yep that worked. Flick off........, flick off..........flick off.......... wouldn't stop until I turned the car off. Turned back on........ washer/wiper still going..............tried again.......... still going.............
Got book out to find out where fuse is, neighbour over the fence was outside & noticed i seemed to be having a problem, so he came over & took the fuse out. I tried to put it back in later to see if it, had re-set or something, but I it was easier to get out by feel, than to get back in. Could feel where it had to go, but couldn't get it clicked in.
Earlier this year, occasionally when I turned the car on, the washer/wiper would go for a few seconds & then stop, so she must have been letting me know the potential of a problem, lol.
Googling/FB auto electricians in the area, there is one open tomorrow

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What't the possibility of it being a quick easy fix? Suggestions of what it might be? Someone said it could be a relay, but I just searched on Toyodiy & I couldn't see a relay for the wiper/washer. Could possibly be a switch?