Battery and brake light on - 1995 Nissan Maxima

John, According to Nissan forums weak failing alternator is the common problem for bat and brk light on. If you are sure battery and alternator are good, I say check and clean battery connections and all grounds(loosen and re tighten all ground connections to give good contact), check belt for being loose.
Check the attached links,
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BATTERy LIGHT PARKING BRAKE LIGHT on Maxima Forums

. What would cause the brake and battery dummy lights to come on as your car...

Brake and battery lights on New alternator loose serpentine belt

Battery Light Brake Light on HELP

John, I think I may have already answered this one.Check and clean battery connections and all grounds(loosen and re tighten all ground connections to give good contact), check belt for being loose. Nissan forums say it is a bad alternator.
Check the attached links,
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Battery Light Brake Light on HELP
BATTERy LIGHT PARKING BRAKE LIGHT on Maxima Forums
What would cause the brake and battery dummy lights to come on as your car...
Battery light and brake light in dash Nissanhelp com Forums

Hi Greg:

Is it possible that the brake switch is stuck on?

That would eventually cause the battery to go dead.



I'd suggest you charge the battery and try temporarily removing the wires from the brake light switch. See if the problem continues. Do not run the vehicle on the road without functional brake lights. UNSAFE, and ILLEGAL.

check sensor switch at the brake reservoir

The battery may not be charging, alternator, cable, or fuse problem.
The brake system may be low on brake fluid. The parking brake switch may be telling the light the parking brake is on.

For some reason the brake warning light and battery light are connected, so either system could be having problems.
The battery warning light could mean the battery is not being charged, and the brake warning light could mean you are low on brake fluid.
I would start with the check engine light and see what the codes are.

When you replaced the battery, did you have the alternator tested? The battery light indicates either the battery is not holding a charge or not receiving the proper power from the alternator to charge the battery.
The brake lights could be a glitch but it could also mean that you are low on brake fluid or you have air in the brake system. Suggest you at least check the fluid level in the master cylinder and bleed the brakes.

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.

brake light- check level of brake fluid.

abs light- have car scanned with ABS Brake Scan Tool (OBD-II compliant).

battery light- The alternator probably is not charging the battery enough when running. Possible bad battery if one lets it go too long.

OK, the brake light is caused most likely by the emergency brake cable being broken, and the pedal or brake lever is not in position.

Also, the brake light could be caused by low brake fluid level. Check that, too.

Battery light, is caused by the charging system not working, like a bad alternator or shorted out battery, or both.

I would have these issues repaired before driving any distance.