low voltage ligth gose out at 3000rpm. comes back at lower RPM

Question

PO622/ battery ok/ generator test ok/

Answer 1

Check the connection if there is low output at idle you have a connection problem the place to check is the B+ connection of the battery connection to the alternator

​ The other connection is the field control for the alternator here this alternator premature wore out doe to a failed connection especially where the locking tabs failed to make proper connection