galaxydarren

Hi there i am a new galaxy owner have suddenly developed a eletrical fault i am thinking it could be alternator? I have purchased this vehicle with fault and have noticed there is no batt light on dash boardcluster its fine on long run butshort trips or overnight its flat has anyone ideas am i right the to be looking down alternator route? 1999 t reg 1.9tdi ghia x PLease Help many thanks in advance