The seat belt problem sounds like the receiver will need to be replaced becasue the switch is internal. Did the rest of the problems start after you did the alternator replacement? If so I would say the alternator might have a diode out if not then remove the cluster and check the plug in the back, unplug it and then plug it back in again this will fix a bad connection.
Please let us know what you find.
Monday, June 26th, 2017 AT 1:42 PM