When the switch or clicker on your ceiling light fails to work, the most likely cause is a loose connection from the wires within the lighting unit, meaning that the electric current between the light and the clicker has been compromised. The ceiling light must be disassembled and the wires inspected and repaired to fix the clicker on the pull cord.
Switch off the breaker from the circuit panel to shut off the electric current to the light.
Unscrew the light from the ceiling brackets.
Unscrew the housing of the switch to expose the coloured wires within the unit.
List in a notebook which coloured wires are attached to which terminal within the light. Remove the wires from the pull cord switch with a wire cutter.
Strip the ends of the wires about an inch from the ends.
Re-connect the wires from the light to the pull cord. Use the list you created in Step 4 to ensure each wire is connected to each terminal. Twist the wires together at the end that you stripped. Push a twist-on wire connector over the twisted wires to ensure they don't come undone.
Reinstall the pull cord from the hole found on the side of the fan's body up through the inside of the light.
Close the assembly and return the screws.
Switch on the breaker from the circuit panel to turn on the electric current to the light.
Pull the cord to turn the light on.