2002 MR2 Runs great lights,flashers and horn work. No dash,windows,PS,radio

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2002 MR2 My drains for the convertible top got plugged up and there was a lot of water in the storage behind the seats. The next day, the car would do nothing so I starting looking. Battery was ok but I found a blown fuse for the radio and one other but I cannot remember the name of it. I changed those and the car now runs just fine. I have checked all the rest of the fuses and they are OK. Still the air and heat do not work. I have no power steering. The dashboard does not display anything at all ( no speedometer RPMs, gas, etc). I have been told that it is probably a grounding wire but this does not make much sense given that so much does work. Also, the ECU was mentioned but I disconnected the battery and the EFI and waited for all to discharge but that made no difference. Any more suggestions would be greatly appreciated. Thanks

How long has your 2002 Toyota MR2 Spyder had this problem?

4 months and counting