2010 CX-9 ECM Looses connections with all other modules when raining

I recently purchased a 2010 cx-9 with 200,000kms on it. Its awesome! The car works great! But not when it rains. When it does rain, the ecm Looses contact with every single computer on the car, bcm, tcm, fan, cluster, seats etc. Symptoms are: hard shift, stuck in 3rd Gear (because if the tcm), cluster not working (vehicle speed data invalid), fans goes nuts, every lights IS on in the dashboard. I took apart the ecm but there isnt any water damage. Still sealed it good though. I looked at the most obvious connections/grounds and put Grease on them. I got two scrapyard computers that I will try later on once I program the keys to it. Is this a known issue please help me!
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