2002 Ford Explorer Explorer 4X4 lights flash and 4X4 is unr

For about 6 months now my 4x4 hi and low lights will flash 3-6 times about every 2-3 minutes and the control buttons for the 4x4 auto, hi, and low are unresponsive. What leads me to think its electrical and not mechanical is my indicator lights on the dash go a little haywire randomly. I get the door ajar light randomly as well as the air bag light. Also very rairly my windows will become temporairily unresponsive and random times. There has also been a shutter noise heard from the rear of the vehicle with suttle shaking that occurs when driving, this is also rair and random. All these problems started when the 4x4 lights started to blink. I have read alot on forums about probable causes such as speed sensors, control module, transfer case, and electrical sensors going bad. Is there one component that could go bad and cause all these events to happen?