What was found
WALL DISCONNECT BOX 50MK4 CONNECTOR D HAS TERMINATOR PLUG INSTALLED FOR T-S. WITH TERMINATOR PLUG INSTALLED SEATS 12DEF - 16DEF, OP CHECKS OKAY. WHEN HARNESS CONNECTED TO 50MK4 AND 50MK6 SHORTS SEVERAL SEU' S. SUGGEST RINGING OUT HARNESS AND 50MK4 CONNECTOR D AND POWER OUTPUT AT WALL BOXES. RANG OUT WIRES FROM 50MK4 TO 50MK6, NO PROBLEMS FOUND. FOUND BAD SEAT CABLE BETWEEN SEATS 19DEF TO 20DEF. REMOVED TERMINATOR & SECURED WIRES. OPS CHECKED GOOD.