yamaha aerox yq 100cc electric problem?

i braught a yamaha yq 100 aerox and the previous owner has put a stem and handle bar conversion kit and a blue led light up above the rear wheel he also has took of clock and surrounding including indicaters of and speedo cable of, it starts and runs fine but horn, electric start, brake lights, indicaters (rear) all seem to be dead the light switch on the left seems to control front lower light and rear light on or off but no dull or brighter i have changed fuse by the battery and charged battery has anyone got any ideas thanks