Electrical Problems

Have problems with my 55 late cmax, when it is wet. Can park the car up and the wipers will start to move on own, lights flash etc. Engine then will not start. If you get the engine to start will not turn off. Disconnect the battary but still the same once reconnected.

Has been into the ford dealer a number of times still not resolved.

Has any one had the same thing and got a fix for it.