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Combination of brake and battery light mean the alternator is not charging. after you wait for a wile the battery recover some power and will run again but as soon the power drop below 9V the engine die. Test the charging system and replace the alternator
Check for bad connection to the battery. Use a volt meter to check voltage from alternator to the battery, should be 14.5 volts to 15 volts. If you have anything less than that then look for a bad alternator wire from alternator to battery. Also check for a good ground connection to the battery. Do all the testing with everything off inside the car so you will not have a power drain from the system. hope this will help you.
if you can charge the battery and drive it for a while then sounds like the altenator has failed and is not re-charging the battery, good way to test is to charge the battery, start the car and turn the light on, if everything is dimm or the motor dies there is little to no charge voltage, and will require altenator work
Check belt(s) first then put voltmeter on battery and record voltage while running if you can, even if you have to jump it to get it going. take time to read owners manual & locate any fuses that may be associated with alternator circuits, most likely in power distribution box under hood, and check for one blown. Do you have a 12v test light by chance?
take a volt meter and go to the battery check the voltage before starting the vech . start the vech check voltage at the battery again has it changed. and what i mean is that if your battery voltage 12.0 volts and when when you start the vech the voltage gose down our dose not increase the alt is not working needs to be changed change the belt while your there thanks kdc744
Try cleaning the battery cables where they contact the battery. If that doesn't do the trick, most auto parts stores wil ltest your battery for free. Do both first before lookng into the charging system.
Alternatively, Place an external battery charger on the batteryand charge it up. If that fixes it then test the charging system.