Cig. lighter? You must smoke alot. What is the clue that told you that it was the lighter ? Have you checked the output on the alt. while it was on the car while your acces. were on and off ? Are you running a mega watt sound system ? Have you check the car for a battery drain with everything off ? You can do this by taking the ground cable off the battery and put VTM between the neg. post and the ground cable. If you get a reading,start pulling fuses until the reading goes away. Then see what the fuse controls. A common problem sometimes was the glove box light stays on, Trunk light,if you have one, belive it or not the interior light receptical and that light didn't even have to be on. Go figure.
After all that said and done, Is you alt. light glowing at you ? Does your alt . light bulb come on when you just turn the switch on ? Some Jettas and Rabbits/Golf alt. lights are part of the charging ciruit and if they burn out, the alt. will not charge and you won't have clue as to what happened without that light burning. :roll: