Thanks for the replies, everyone! I unplugged all the connections and plugged them back in. There was some corrosion, but nothing major. After this, I tried to start it, and it fired right up and ran PERFECT (using a remote fuel tank being gravity fed). Now I have to figure out why 12V still isn't getting to the fuel pump, and for some reason the electric PTO isn't working.
I'll keep everyone updated.
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