More than likely it is a bad ground wire. You can check the connections from battery to frame... I would drop a dollar or two on a new ground wire, clean the frame well, rough it up, and make a good connection. Most of the time a dead battery is caused by a faulty connection... usually the ground side.
If that doesn't fix it... take the battery out, turn it all the way around twice, set it back in, tap the top with a phillip's head screw driver [standard size will do], reconnect the battery, slam the hood, spit on it, curse, get in and put your head on the steering wheel, pray for forgiveness for being angry and cursing, ask the Lord for help, and turn the key.
If that don't work...then God don't care and that things got the devil in it.
bad alternator, bad voltage regulator, bad battery, bad connections.
dead battery dead alternator dead voltage regulator each needs to be tested.
the regulator in your alternator must be in trouble remove the alternator and take it to an alternator repair shop or fit a new alternator
Red means that the battery charge level is low or that the alternator is not charging battery properly. Check alternator, voltage regulator, connectors.
Obviously check the battery. Anyway, if the alternator, battery, and wires connecting them are good the voltage regulator is next on the list.
If the battery checks out okay, you can replace just the voltage regulator inside the alternator.
battery tests good, alternator tests good, new voltage regulator installed and still no charge to battery from altanator .
The charging system on modern cars has 2 parts. The alternator and battery. On older cars there is also the voyage regulator. On modern cars it is built into the alternator. The electrical system however has many more parts.Alternator, voltage regulator, and alternator belt. The batteries themselves are part of the cranking system, not the charging system.
All cars have a battery make the electrical components function. The charging system consists of a battery,starter an alternator and a voltage regulator. The battery turns the starter over causing the engine to run. As the engine is running the alternator produces electricityto keep it running. The voltage regulator keeps the current regulated so that the battery does not overcharge. ok, the forst answer was nearly correct except the starter motor is not part of the charging systm. the charging sytem consists of, the battery, the alternator,or generator,and thevoltage regulator. the voltage regulator is sometimes built into the alternator on newer cars ,where as they all used to be an extra equipment bolted onto firewall or inside fender
Bad alternator, voltage regulator, or battery. Also a loose or corroded cable or bad cable.
The drive belt is not tensioned. The fuse in the line between the battery and alternator is blown. The battery has a bad cell. The voltage to the alternator field is missing from the regulator or ignition switch circuit.
Possibly the voltage regulator has a poor ground or poor +12v?