TK SB3 MAX Plus Reefer No Start

Not quite sure where to post this, so if I'm in the wrong please let me know. The reefer was running perfectly fine and then it stopped, no power to display, so far I've replaced the power switch due to corrosion and found some surprising discrepancies with the schematic, but the schematic I have is for a different model reefer, same electronics, and engine from what I can tell though. There were four wires going to my switch, CH, 8, and 2AB but none of them are hot, and CH had the trace on the relay board blown out. All fuses are good continuity checked and no corrosion on the contacts. Any ideas?