Hey so my Seville is having a problem, it started the other day I had a couple weak starts during the day and the car later died on me, I replaced the battery and ran the car for a while and it continued to go down after the new battery was in. So last night a put in a new alternator, and now when I run the car for about the first 5 miles of driving it stays up at 14V and then it will start to drop down and gets down between 12.8-13.2, and sometimes dips lower. I feel like there is still something wrong. Any ideas on what could be causing my voltage to drop like this?

 

Try checking the connections for the power supply at the main fuse box underhood.