What was found
AFTER SETTING 40 N1 AND ADVANCING THROTTLES FOR TAKEOFF THE 2 EPR GAUGE FAILED. REJECTED TAKEOFF AND RETURNED TO THE RAMP, NEEDED EPR'S FOR MANUAL THROTTLE SETTING. TROUBLESHOOTING IN PROGRESS. AWAITING PARTS. PERFORMED WIRING CHECK BETWEEN 2 ENG EEC TO 2 EPR INDICATOR FOUND WIRE R77150029 AND SHIELDED WIRE AT 2 EPR IND CONNECTOR SHORTED. REPAIRED AS PER SMP. AWAITING EEC AND ENG RUN. ENG RAN CARRIED OUT AS PER A310 JRH BY AMT 439456 EPR AND ALL OTHER PARAMETERS NORMAL. ACFT OK FOR SERVICE.