I need to change the voltage reg. in my 99 accent and im not quite sure where to find it or how to change it can anyone help me?

the voltage regulator is inside the generator . i suggest that you just buy a reman unit bt id your feeling up to a challenge you can take the alt out of the vechicle and open the case and replace the regulator/ brush assemb;y hma service.com is an online shop manual that may help you good luck