I'm working on a 92 sc400 and it's becaoming a real pain. I managed to get the power antenna working again, but the problem is the previous owner put everything aftermarket into the car, and it was all done wrong, therefore nothing factory works at all.
this includes, p windows, p sunroof, p locks, blower, p mirrors work but only in one or 2 directions, this car does strange stuff. It's still a valuable car so it's worth figuring out. Also, the windows and sunroof were working for a while, then suddenly stopped.
one more thing, the car won't start unless you crank very short and quickly let go and it will start itself from there usually after a few tries.