What was found
EFIS AUXILIARY POWER ANNUNCIATOR FLICKERED, WENT OUT, AND THEN WOULD NOT TEST. MAINTENANCE FOUND RELAY MODULES K103, K104, AND 5-AMP FUSE F033 INOP AND REPLACED THEM. LATER, DURING TROUBLESHOOTING FOR ANOTHER ELECTRICAL PROBLEM, FOUND A CHAFED WIRE J692007-J690003 IN THE AVIONICS BAY, MIDDLE SHELF BETWEEN THE VERTICAL GYROS. REPAIRED THE CHAFED WIRE, AND OPS CHECK GOOD.