rules.
1; does the pump make its normal sound, buzzzzz
it is a timing electric dc brush motor, that all make sound turning and pumping
2: the pump is on the bottom or fed from the bottom of the wish shield washer tank, lost that, missing,damaged, OIL inside from jiphphboobs? hacklube centers, or?
kids playing there?
so fuses are first, always, its electrical and all have fuses.
or circuit breakers. this has fuses.
so find tank (engine bay)
open lid?
is it full of blue fluid? (mines orange, rainx)
person2 turns it on, hear the pump now??????
yes. good the lines or nozzles are clogged (means clean them)
no.? bad news. you do know, isuzu is dead company here right
go to there usa, web page, see allthose missing parts and zero drawing (DOA they are)like suzuki now. and Daewoo before.
there all 1step away from YUGO zoned, (my lil joke)
now facts from a real fsm no lies like you got
truth
no relays
no warning stuff
1 fuse,CB 17 ,20 amps. CB = cab box
1 switch
1 motor (pump)
below the real deal
check for 12vdc to motor, turned on,ok
then check motor ground pin, if 12v ground is bad
if 0v ground is good (turned on ) then pump is dead
or just packed solid in ice or dead bugs,means clean it)