peugeot speedfight 100, my headlight and back light wont work?

i have a peugeot speedfight 100 2007 model and last week my headlight, sidelights, and back light just went. my high beam works when i put it on a flash but it doesnt work when i switch it on fully. my indicators and horn works and when i press the brake the brake light comes on. i have spent 80 quid on the job so far where we found that the wiring loom had burnt out so i have got a new wiring loom in. i have also replaced the switches for the indicator, horn and high beam. i have also got a new regulator and generator put in. we are now really stuck on why the lights dont work. can anyone help?