Oh a soggy ECU sounds bad.rubber seals of the plastic clips for the wiper scuttle panel under the windscreen left side has perished n water off the wipers flow through it and down into the cabin air inlet port and onto the passenger well and prob over the ecu too.
http://micra.org.uk/threads/pollymobiles-rebuild.35251/#post-381119
Watter ???? proper bit of Cornish there boy.I had that exact problem theres a rubber grommit under the car that was half out in mine and watter was getting into the car
Whats cornish