1998 Dodge Caravan Electrical Problems

Recently, my 1998 Dodge Caravan started having some wacky electrical problems. Occasionally, the spedometer, interior lights, radio, door locks, and clock will not work. Also, my ABS light comes on and will not go off after the vehicle is started. There seems to be no pattern to the problem. One day the spedometer works, but the radio won't. The next day, the radio's out, but the spedometer works. Currently, all other guages, exterior lights, heater, wipers still work. So far, I have had no trouble starting the vehicle, but am concerned because I have a long commute. Any and all comments are welcome!

Test the grounding system, something might be loose

could be ignition switch faulty intermittently