What was found
AIRCRAFT NOT GROUNDED. ON TAKEOFF AT ABOUT 60 KTS M/C LIGHT INDICATED NR 1 ENG SENSOR FAULT AND LOST THE EGT INDICATIONS ON NR 1 ENGINE, THE TAKE OFF WAS REJECTED AND RETURNED TO GATE. DISCONNECTED 4007VC CONNECTOR FROM EGT CORE HARNESS FOUND CONNECTOR DIRTY CLEANED PER 70-11-57, RECONNECTED INDICATION NORMAL.