Brake light and battery light came on at the same time

car alternator may be stock. and brake sensor, try to clean it

This would not affect the brake light. Now that you have a new battery, unhook both cables for 15 minutes, then rehook to reset computer. See if this solves the problem with the lights, at least the brake light. If it does, then it can be the alternator unless both lights go out. Then it was a problem at the computer having to be reset.

charge battery if starts check brake light is it still on if so alternator is bad

Sounds like brake light switch is stuck. Follow brake pedal up under dash. There will be a electrical switch that sets on pedal. Dissconnect switch lights out. Replace switch.

Try a day time running light modual,these things are notorious for messing up,and since they are supposed to work when the car is charging it seems like the logical solution.

sounds like your brake light switch is stuck ,, when you say tailights ,, are the front ones on too !?,,, ck. and se if it is your brake lights, ,, see if 3rd light is on ,, if so ck. down @ brake pedal there is a switch on the top area wiggle it and have some one stand out back ,, seewhat happens ,, localparts store should have it ,,50 to 100 bucks

sounds like a open diode in alternator,when brake and battery lights come disconnect green plug on alternator,if the lights go out you've found the problem,very common problem with subarus

yes it's most likely a alternator problem,usually the internal diode bridge breaks causing all lights you mentioned to come on,if this happens at a idle open the hood and remove green connector on alt.if lights go out you've found the problem

If the blinker is doing double time then there is a blown bulb or bad connection somewhere in the lighting system. Check all bulbs and sockets for wear, rust , moisture. It is in your rear light system.. replace all rear bulbs clean connections. Be certain to use recommended bulbs. In some cars universal bulbs can cause a voltage reading problem. Also check your brake switch.

I have a similar situation but it turns out that I am also having an unsolved problem with my 2005 Ford 500 electrical system. Although it could be due to a weak battery I have reason to believe that its root cause that something is wrong with the brake light system. Sometimes when I drive the brake lights stay on and other times they don't. Yesterday, with my foot off the brake pedal (in Park) the brake lights would stay on until I lifted the brake pedal. Today, I can not get it to repeat the symptom nor could an expert auto technican find the problem within several minutes. The battery has been tested and found to have 40% of its life(?) remaining.