I took my car in to get serviced. I was told that my battery was about to die and that I should replace it. Shortly after that I noticed when I would start my car several warning lights TCS OFF, ABS, Emergency Brake light would all stay on. I turned it off and restarted it and they would be gone. I assumed that was because of the bad battery so I replaced the battery with a brand new one. I started the car no lights appeared, a few hours later I started it and the lights were there. What could be causing these lights, do I need to do some kind of resetting?
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Check or have the battery's state of charge tested with a voltmeter. If the battery is low on charge, have it charged up. If all connections on battery and starter are clean and tight,, car should start. If you get it started and the alternator/battery light stays on with car running, there is a charging system malfunction. Have the alternator tested, in that case.
it is possible that the low beam headlight bulbs went bad at the same time, need to check for power at the headlight connections. if no power it is possible that you could have blown a fuse since the car has had other electrical issues. also will want to check the dimmer switch on the steering column, it to may be bad not allowing the low beams to work.
Was this mechcanic certified? It sounds like your altenator has a weak diode or regulator instead if the car does start every day. To see if you have a bad diode take a volt meter and set it to the DC switch for direct current. Have the red probe to red (POSITIVE) and black on black (NEGATIVE) It sould give you a reading of 13.5 volts when the engine is running. If not switch the red wire from the meter to the black (Negagtive) on the batteryand the black wire from the volt meter to the red (Positive) to the battery. If you get the same reading when inverting the wires you have a bad diode. A diode only lets current flow one direction. If it shows flowing both ways it will under charge your battery causing it to die out
It is the alternator then. Dont take it to the dealer though because im sure they are charging you a pretty penny just to tell you there is nothing wrong. With a car this new I would not think this but there may be a short somewhere that is draining the battery but HIGHLY doubt it. Take the alternator out and take it to Schucks and have them test it.