What was found
RED NOSE GEAR UNSAFE LIGHT ON FOLLOWING GEAR RETRACTION; FOLLOWED RED TABS & RETURNED TO VLN FOR LANDING. REMOVED AND REPLACED NOSE GEAR LOCK SWITCH & POSITION SWITCH. PERFORMED ADJUSMENT/TEST, NO HELP. REMOVED AND REPLACED LANDING GEAR ACCESSORY UNIT AND PERFORMED NOSE GEAR LOCK AND POSITION SWITCH ADJUSMENT/TEST AS PER MM 32-61-071-4 AND DIDN'T HELP. ALSO PERFORMED WIRING CHECK BETWEEN LOCK SWITCH AND NOSE GEAR WHEEL WEEL CANNON PLUG AND FOUND WIRE C-BROKEN. FIXED WIRE-C AS PER 727-200 SWPM. REINSTALLED ORIGINAL LANDING GEAR ACCESSORY UNIT. PERFORMED NOSE GEAR LOCK AND POSITION SWITCH ADJUSMENT/TEST, AND NOSE GEAR RED LIGHT WORKED PROPERLY WITH LANDING GEAR IN UP POSITION.