Battery and brake light constantly comes on - 1997 Nissan Maxima

Battery light comes ON,this is indication of battery not getting charged by the alternator in the car.So the battery is loosing its charge/voltage.Other possibility of battery light coming on is battery is getting weak and it needs to be replaced.In some cases,just removing and cleaning the battery terminals and then reconnecting the battery terminals again.solves the problem.But also check the battery voltage by voltmeter.A fully charge proper battery will give 12 volts.If there is then get the battery terminals cleaned and reconnect and check.-------------- Now another problem,the brake light comes on when,the brake fluid is near to end or there is any problem with brake system,that is if brake pads are getting worn out or brake caliper is getting loose,In this case first check the brake fluid,if that is fine then check the brake pads and caliper.If that is also checked fine,then only in that case.Check the brake light switch.The switch is located where the brake lever is.Remove that brake switch,clean its wiring and recheck.It should help.-------------- Thanks.Helpmech.