As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STAB TRIM EICAS MESSAGE AND DESCRETE LIGHT AFTER ENGINE START WHILE TAXI OUT ,AC RETURNED TO GATE AND MTX GROUNDED AC. MTX FOUND PINS 2&3 SWAPPED ON PRESSURE SWITCH 527. CONNECTED PINS. REF BOEING SWM 20-61. STAB TRIM FUNCTIONS & INDICATIONS CORRECT REF B7676 AMM 27-41-00 AIRCRAFT RALM "CAT I" PENDING MCDP 30/40 TESTS. MTX RETURNED AC TO SERVICE