What was found
TAXI OUT WITH SELECTOR OF ANTI-ICE NR 1 ENGINE DID NOT LIGHT, NR 2 DID LIGHT. EGT SOGS RISE. CHECKED LIGHTS BUT PANEL DOESN'T HAVE POWER. CIRCUIT BREAKER TRIPPED. ANTI-ICE WING PANEL ALSO LACKS POWER. ACFT GROUNDED. FOUND ENGINE AND WING ANTI-ICE PANEL HAD SHORTED CONTACTS INTERMITTENTLY ON SOCKETS FOR LEFT WING-ANTI ICE VALVE OPEN LIGHT. REPLACED THE PANEL DURING OPS CHECK IAW AMM 30-11-41-710-801. TURNING WING ANTI-ICE VALVE ON CAUSES THE CIRCUIT BREAKER FOR ENGINE 1 ENGINE WING CONTROL ON P18-3 A6 TO TRIP. VERIFIED SHORT ISOLATED TO NR 1 ENGINE MW0311 WIRE HARNESS COMMON TO GROUND WING TAI TEMP SOLENOID VALVE. REPLACED THE WIRE HARNESS MW 0311 IAW AMM 73-21-06-400-802-F00. OPS NORMAL. THE CIRCUIT BREAKER REMAINS CLOSED.