Hey Scotty, got a 99 sentra with about 180k. Recently got smog check here in California and then the battery and brake light on the dash came on. Alternator went iut so had it replaced. 3 days later same symptoms again. Got it home and the next morning when I turned the ignition switch neither the battery nor brake light comes on. The rest of the dashboard lit up. Where do I check. The alternator doesn't charge and I read if the battery light and brake light don't come at the beginning the car will not charge. Thanks

sounds like a wiring failure , pray it's not a computer module failure > Just realize a sentra that old is pretty much 3 wheels in the junk yard money pit, dont spend too much