Wire coming from under AC compressor has voltage, where does it go?

I have recently replaced the head gaskets on my 99 Sienna. I did not however take it apart. After everything was put back together, there was a wire coming from underneath the AC compressor that looks black and yellow, it is a live wire (sparked when grounded) and is zip tied to the wires leading up to the fan. I looked everywhere for where this wire connects to but can't find ANYTHING. The AC does not work, the AC light blinks, and the fans don't seem to come on either. Where does this wire go and what does it do?