my car wont start!! when u turn the key it just makes a click!! like there's no power but i checked the battery and it works..i dont know what is it..somebody know??

 

Need more info. How do you know that the battery's good? Is the click you're hearing the click of the solenoid, or from one of the many relays? Are your battery terminals shiny clean on the INSIDE of the connections? Have you tried jumping it from another car's battery?

 

it just goes click, the battery is new so i know it works, but i just when u turn the key it clicks, and if u have the lights on, they go out, then when u stop trying to turn it on..the lights come back on, i dont know whats wrong..

 

If the lights are dimming, it's pointing to the starter. You might try this. Get under the car (key off) and give the starter a couple of hits with a hammer. Not hard enough to dent the starter, but not light taps, either. Then try to start it. Surprisingly, this'll often get it started once or twice if the starter's "not completely dead," as the Monthy Python guys used to say. And if the solenoid is sticking, this will usually knock it loose. Either way, it sounds like you'll be taking out the starter soon.

 

Sound like the starter. Just remove it and bring it to a parts store to check it out. They usually check it for free.