2008 Dodge Caravan lighting problems

Was driving home at night when randomly my lights started flashing, horn started blaring, windshield wipers started going off, washer fluid was spraying everywhere. Locks were locking and unlocking. I ended up driving into someone's lawn as I could not see properly with poor lighting and all the distractions. Once I got home the vehicle continued to be possessed even without the key in the ignition. I was finally able to get everything to stop after unplugging the battery.

I complained about this before and it is only getting worse!!!! I won't put washer fluid in my van a waste of money!!!! I took out the horn fuses because of the defect and it is only getting worse because now when it happens my head lights don't work!!!! I was driving to the hospital for surgery when it was dark out and the wipers started going and now when it happens my headlights don't work!!! I don't feel like it is my responsibility to fix the problem!!!!