2005 freightliner century class

Hi
I have a 2005 freightliner century class
I just brought 4 new battery 950 hook it up try to start the truck it wouldn't start just make a click noise 1 click noise so I check the battery voltage there fine check all fuses inside the truck and behind the drive seat fine too. I also noticed that there 3 more fuses on the battery cables 2 coming out from the positive and one from negative and the negative is the one that keep burning out every time. And befor this issue every time I use to turn on the truck my check engine light would turn on for a few seconds and it would turn off after truck crank and now the check engine light doesn't turn on helping plz