What was found
NUMBER TWO FIRE WARNING, TEE HANDLE WILL NOT ILLUMINATE WITH "OVHT DET SWITCH IN THE NORMAL POSITION. UPON PLACING THE OVHT DET SWITCH TO THE B POSITION A FAULT LIGHT ILLUMINATES. THE TEST IS SATISFACTORY WITH THE OVERHEAT DET SWITCH IN THE A POSITION. ACFT GROUNDED. VERIFIED DISCREPANCY. TROUBLESHOT AND FOUND CORE FIRE DETECTION HARNESS MW0326 WITH A BROKEN LUG AT THE 11 O'CLOCK CONNECTION. REPLACED NR 2 ENG MW0326 HARNESS IAW AMM 26-11-02. PLACED THE NR 2 OVERHEATT DETECTOR SWITCHED BACK TO NORMAL POSITION. ENGINE FIRE DETECTION OPS TESTED NORMAL IAW AMM 26-11-00.