1998 Jeep Cherokee issue...Starts up and runs no problem but no power to any of the lights, radio, power windows, dash cluster is dark except for 2 idiot lights which are on: Brake and Airbag but power loss does not happen every time car is started, it's random, sometimes power works and sometimes it doesn't. Then after driving car when transmission is put into Park or Neutral I get a grinding noise but not every time, it's random. These may be related or not both problems are sporadic. Disconnecting and reconnecting battery corrects the weird power loss issue, at least temporarily. No OBD codes displayed when tested. Any thoughts.