Electrical problems and bad possible clock spring

Hi we just bought our 98 plymouth voyager se and their seemed to be no problems until I heard a clicking in the steering wheel column. After hearing the clicking the rear winsheild wipers went on without turning them on the gas warning light was going off while we had a 1/2 tank at the same time. Then it stopped but the gas gauge has been still acting up. We also have intermittent problems with the power locks not working, power windows, sometimes the front wipers go off too with out turning them on also, ignition does not work always either. Cruise and horn also do not work. I was told it was the body control module however self diagnostic test read 999 code which means no problems. Do you think a bad key switch and also a clock spring could cause all these problems? What do you think it is? Thanks for your help.