why would my battery light flicker with a new battery in it? on 1997 Lincoln Town Car

happened yesterday dash went out and lights went out on car i replaced the battery and light continued to flicker after it was in. then same thin happened bttery drained

Asked by for the 1997 Lincoln Town Car
Check your alternator, it should be putting out between 13.8-14.2 volts.
thanks was pretty sure thats what it was gonna get it checked out thanks u again