As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BATTERY MASTER BOX, CAUSED BATTERY DISCONNECT TO ILLUMINATE AFTER GPV REMOVAL AND WHILE ENGINE WAS RUNNING. WITH BATTERY ON, NO POWER FROM TB2 OR TB3. UNIT FAILED TEST FAILURE (FAILED BEFORE COMPLETING TEST). A LATER ATTEMPT TO TEST PASSED BUT UNIT WAS SLUGGISH. A THIRD TEST WAS DONE WHICH RESULTED IN THE SAME RESULTS AS THE FIRST. REPLACED WITH NEW UNIT CORRECTED PROBLEM. NOTE: THE REPLACEMENT UNIT HAD SOME COSMETIC SHIPPING DAMAGE.