the wiper motor & washer motor share the same fuse. so if the washer/wiper fuse went, they'd both stop.
since the fuse is intact, next check is if the stork switch is making the right connections.
the wash function makes two connections, one to send power to the motor, goes through the motor and then also triggers the wiper control module to begin wipe, the other switch is to ground the motor.
when u trigger front wash, does it trigger the wipers to come on? if yes then power is going through the motor and trigger the wiper control unit but the motor can't turn, maybe seized.
to check wiper circuit, unplug from motor, put multimeter on both pins and measure for any voltage change while triggering the wash.
if there's no voltage change while washing but fuse is intact, one of the two contacts on the stork switch ain't working, check or replace stork.
if voltage changes but motor doesn't work, the motors worn.
the washer motor is quite prone to wear & damage.
once the old shaft rubber seal begins to leak, wash fluid begins to flood inside the motor and rapidly corrode or wear all the insides till it seizes or the bushes wear out.
https://www.micra.org.uk/threads/pollymobiles-rebuild.35251/page-32#post-470480
only fix was either get a spare from scrappers which could also be worn or replace with a new one.
got mine from amazon, halfords also sell em, but twas for a facelift loom connector
https://www.micra.org.uk/threads/pollymobiles-rebuild.35251/page-74#post-569106
so just soldered on a facelift connector from the scrappers
https://www.micra.org.uk/threads/pollymobiles-rebuild.35251/page-74#post-570182
