What was found
PERFORMED T/C 78273000, FOUND FAULT CODE 77-20862 (THE BOTTOM LEFT EGT SIGNAL (T495S3) IS OUT OF RANGE) REQUIRES 50 HR RE-CHECK. GROUNDED - YES. PERFORMED #2 ENGINE CURRENT FAULT CHECK. FOUND S3 PROBE SHOWING DASHES. ACCOMPLISHED B737-800 FIM 77-21 TASK 803. TRIED A NEW PROBE NO HELP. REF B737-800 AMM 77-21-01. INSPECTED AND FOUND FOUND CJ10 HARNESS INTERMITTENT. DUE TO HISTORY REPLACED CJ10 PRECAUTIONARY. RMVD AND INSTALLED NEW CJ10 HARNESS REF AMM 73-21-06. SYSTEM IS WORKING NML. S3 16.32, S4 30.75. ACCOMPLISHED SYSTEM TEST REF AMM 73-21-00-700-801-F00. SYS CKS NML.