I just got a 1997 D'elegance and there is some electrical problems only sometimes. The battery is under a year old and it just died recently so i jumped it and now its perfectly fine at 14 vlts. Then the stereo will just make a humming sound and thump occasionally and the windows dont work all the time. Any advice?

check and clean your battery cables make sure that they are tight on the pos cable side youmay have to add a washer to tighten properly