As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LH WING BODY OVERHEAT LIGHT STARTED TO FLICKER, AIRCRAFT DIVERTED. WIRE HAD CHAFED THROUGH AND WAS SHORTING OUT INTERMITTENTLY. WIRE CONNECTED TO D866 OF SENSING ELEMENT M276 "OVHT DET SECTION 58" AT THE APU SHROUD AREA. REPLACED.