Replacing a ceiling pull cord switch for electric shower

The neon being permanently 'on' is usually caused by wiring the permanent live conductors to the 'load' side of the switch - you need to check this. Also to consider is a burnt wire commonly caused by a loose connection to the switch. You must cut away all signs of overheated wire back to where there is bright copper. Failure to do this will mean that the connection is likely to overheat and would cause a dangerous situation. Make sure the new connections are tight also with the correct sized screwdriver. Always ensure power is isolated but ultimately hire a qualified electrician to ensure your safety. ABS ltd.