I bought one of these bike and the light has not came on or turned on how do you do that or does it need to be replaced im trying to figure out

Hi Bobbie. We understand your disappoint and hold ourselves to a higher standard than what you've experienced. Lowe's has a 30-day return policy if you'd like to take the bike back for a refund or the following link can direct you to the nearest service center where warranty repair can be done: https://www.axis-offroad.com/service-locator.