Went to take the lil girl to school this morning and no blower (not even on high). Was a cold ride. Thinking about all the possibilities and was stuck in traffic on the way back. All a sudden it started blowing while on speed #2 and also worked on all speed settings. Nothing triggered it like a bump or jolt, just sitting still idling in park. None of the controls worked either such as AC, rear defrost or re-circ and neither did the button lights. I am guessing a bad connection or ground. Where do I start troubleshooting this?