What was found
(CAN) AS PILOT SELECTED GEAR DOWN ON APPROACH "GEAR WARNING" CCT BREAKER TRIPPED&UNSAFE LIGHT DID NOT ILLUMINATE DURING GEAR EXTENSION. PILOT NOTICED THAT HE HAD 3 GREEN LIGHTS INDICATING GEAR DOWN&LOCKED. AIRCRAFT LANDED W/O INCID.. MANTENANCE FOUND L.H. DOWNLOCK SWITCH WITH WIRES PULLED OUT OF SWITCH BODY. DOWNLOCK SWITCHES TURN OFF GEAR WARNING SYS WHEN ALL 3 SWITCHES ARE ENGAGED. PULLED WIRES WERE SHORTING OUT&WHEN TH E GEAR SELECTED DOWN BREAKER WOULD TRIP.WHEN LDG GEAR RETRACTS WIRES RUB ON GEAR LEG,&IF SWITCH IS INST W/O ANY SLACK IN WIRES THEY CAN BE PULLED OUT OF SWITCH. WIRES WERE WRAPPED WITH SPIRAL WRAPAND SWITCH INST WITH ENOUGH SLACK IN THE