It could be the alternator or an electrical issue
my 1997 pathfider cranks but will not fire.
No spark No fuel No compression
The same way you started it before replacing the battery.
It should be no different than before. Just start it up. If it want start make sure the cables are tight. If this doesn't help you got other problems.
Does it turnover?
No, but it could cause the check engine light to illuminate.
There are several things that can cause your 1997 Nissan Pathfinder to stall. The most common cause is a lack of fuel caused by a malfunctioning fuel pump.
A bad cylinder had will cause your 1999 Nissan to not start. Check the oil to see if there is fuel in the oil.
dead battery
No
Starter lockout relay, next to the battery.