As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: STAB OUT OF TRIM LIGHT ILLUMINATED DURING CRUISE WITH EITHER AUTOPILOT A OR B ENGAGED; THE LIGHT FLICKERED INDEPENDENT OF TURBULENCE. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT FSD. FOUND YAW DAMPER SWITCH IN OFF POSITION, PLACED IN THE ON POSITION, ACCOMPLISHED FIM 22-11-00-810-851, DFCS BITE, AND BITE LIBRARY TEST 60.32 NO FAULTS NOTED.