Electrical problem (fuses)

[top cat]

I replaced the new stereo that was installed in my car when i bought it with the original stock SVX stereo system (luckily the previous owner was kind enough to only splice in the new adapter and leave the old one as well). However, when I disconnected the battery to perform the task, the wire fell back on the positive battery terminal and I ended up blowing a few fuses. I replaced an ATO fuse to fix the interior lighting, unfortunately I still have no power to Heat/cooling/fans or Stereo power, nor will the temperature display work. None of the other ATO fuses are blown.

I'm sure one of the large Black (19amp?) fuses are, but I'm not sure how to check if one is blown (they are all original fuses and coated in a dark impenetrable black grime..) Does anyone know which particular fuse(s) might be responsible? I'd want to rule out a short in the stereo wiring after checking the fuses. Thanks!