Problem with Peugeot 406

Hello friends of the forum, I am fixing an automatic peugeot 406, v6, one of the problems I have and is the one that urges me most because it is the one that is giving me the other failures, it is, the motor of the car when it starts it swabs the engine, the lights, if I upload a window it also does, now, I remove a terminal of the battery and the engine is stabilized and everything works well, it works well, it works well, it works well, It seems good tomorrow I am going to check the pill, and see if I can change it or change the alternator but that you think that it can sincerely be that car what I need to give Candela is little, every day you get more things, a greeting to everyone and I hope you can help me ...