What was found
NR 2 ENGINE EGT RED BOXED UPON MORNING APPLICATION OF ELECTRICAL POWER. GROUNDED - YES. FOUND T495 S3 DASHED OUT. FOUND RESISTANCE OF CJ10 HARNESS TO BE 2.8M OHMS INTERMITTENTLY. REPLACED CJ10 HARNESS IAW B737-800 AMM 73-21-06. REMOVED AND REPLACED T495 S3 PROEB AS PRECAUTION IAW AMM 77-21-01. PERFORMED EGT CLEANING IAW AMM 77-21-00. PRE CLEANING TEMPS AS FOLLOWS = S1- 67.87, S2- 34.12, S3-DASHES, S4- 66.75. POST CLEANING TEMPS AS FOLLOWS= S1- 22.50, S2-18.75, S3-18.62, S4-23.25. ACCOMPLISHED FADEC SYSTEM TEST REF AMM 73-21-00, ALL TESTS PASSED. DURING ENG RUN S1- 421, S2-403, S3-399 & S4- 422.