Have you checked the operation of your AC fan? It seems that AC won't work if the fan doesn't turn. That least thats the behavior i've seen on my 96SR which is pretty much the same as your 95SR.

The AC fan is the one in the front of your radiator. Simply start your engine, Turn on the AC, then check if that fan is turning.

If it's not, try to get it to spin then check if the AC begins to work.

In mine, the Fan was dead. Once I replaced it with a fan (used one from the junk yard), my AC began to work again.

Only problem for me is the fan sometimes stops spinning especially when the engine gets hot so it stops spinning and when that happens, the AC shuts off.