This is the evaporator pressure regulator from my Cressida. I am told it has failed, which is why my a/c does not work. I am skeptical of this diagnosis because of reasons that come from the depths of Toyota forums.
A guy who is parting out a Cressida is sending me this. I am not even sure this is the right part, but willing to risk $20.
Let me know if you have expertise in 1984 Toyota a/c systems.