The trim buttons shouldn't break, they're pretty much of a friction fit.
And moderately cheap to replace if you break one.  I stripped an '86 GL
and among the parts I snagged was the rear door and sprayer mechanism.
The sprayer is on the passenger side near the front of the rear-most
window.  My recollection was that it was pretty easy to get at it.

I had a sprayer die on my '81 back in '89... coincidence?  The
rear sprayer also has its own contact in the steering column
switch (contact L), and its own relay.  I don't recall it being
fused separately.  I know all this because I haven't quite gotten
mine working: I ran the wires this past Wednesday!

        Gary

On Sat, 21 Mar 1998, Judith Barr / Leo Girard wrote:
> My rear window sprayer has ceased functioning after a small ding near just
> next to the nozzle. The pump does not cycle, the front does, after
> depressing steering column wand. Is the pump located in the rear deck? Is
> there a special tool/substitute for special tool that would permit easy
> removal of the trim buttons or do they have to be broken and replaced?