Update.

I have confirmed new SOV functions properly. For that matter, the old one works well too :/ . The valves audibly click when given 12VDC, and the vacuum on the SOV intake drops to nothing with voltage applied.

I am not familiar with car electrical stuff, so if anyone has any thoughts on this it'd be much appreciated. I did check my fuses and they are all good, upgraded them to all copper/bronze anyway since the aluminum was looking old and oxidized.