changed battery / no headlights now / help !
 

I have a 2002 golf 4 cyl 2.0 l . My battery was shot . I bought a new one and installed it myself . After i finished the headlights would not work . I can flick the high beams , but even they won't stay on . Does anyone know if i did something wrong ? Or suggestions on how to fix the issue ? On the bright side now the car starts right up .

thanks for the help