What was found
(CAN) MAINT CREW REPLACED LANDING GEAR INDICATOR LIGHT ASSY ON PREVIOUS NIGHT SHIFT DUE TO SCHED MAINT DISCREPANCY RELATING TO MALFING BULB HOLDER SPRING & CAM SUB-ASSEMBLESON IND. LIGHT ASSY. CORRECTIVE ACTION INC LUDED GEAR RETRACTIN & EXTENSIONS IAW MM. 1ST DEPTR NEXT MORNING A/C ON ROUTE FAILED TO ILLUMINATE NOSE GREEN INDICATION NUMEROUS ATTEMPTS MADE TO SATISFY IND. W/O SUCCESS. A/C ABORTED LDG & RETURNED FOR UNEVENTFUL LDG WITH OUT NOSE GREEN& CFR ON STANDBY. TROUBLESHOOTING REVEALED THAT BRAND NEW LIGHT ASSY INST PREVIOUS NIGHT HAD ONE WIRE OF 4 WITH BAD CRIMP.