Pardon if this suggestion is beyond obvious, but if you get to the point when you would like to try to start the car, I would have all the nonessential electronics disconnected and then start adding them back in one at a time (or add "donor" components)....this way you won't be trying to chase gremlins throughout the entire electrical system, and should be easy enough to find if one component is bad.
Additionally, the per your pic of the climate board...even though there is no obvious corrosion, I would think the IC's would be toast, but then again, I might be wrong.
I said this before, but you sir are a braver man than I...and I salute you for being so.
Last edited by MWS; 01-23-2018 at 08:44 PM.
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