My mothers 94 park ave the volt light came on, after charging the new battery & with car running i am only getting 11.83 volts. the alt. was under warrenty, replaced it twice, the last one i had them test before it left parts store. still not charging. the short hot cable is good, the other wire going into the harrness rings out good as far as i can follow it. does it have a charge relay & which one on the firewall is it?
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Pretty sure your alternator died.
Battery voltage with the car not running should be close to 12.5 volts on a fully charged battery. New batteries need to be charged before they are installed to keep a good alternator from melting down and dying.
With engine running the battery should read about 14.5 volts indicating your alternator is charging. At lower rpms battery voltage will still be above 12.5 volts with the engine running.
If you get it cranked and the battery does not read above 12.5 volts, you have a bad alternator.
The BATTERY light indicates that your battery is not getting charged. There could be several reasons for this most probably your alternator, which generates the current to charge the battery when the engine is running. If the new battery is not getting charged, it will eventually drain not start your car. To confirm that the battery is not getting charged and that is the reason for the BATTERY light, put a volt meter across the battery while the engine is running. It should read around 13 volts indicating that current is flowing into the battery. If it reads 11 volts or less, that means the batter is being drained and not charged. Then have your alternator checked.G
Yes. Some voltmeters read higher volts when the voltmeter battery is low. Use a different voltmeter or put a fresh battery in the volt meter or test voltmeter against a known dc voltage to see if the reading is accurate. After this start thinking it is the alternator regulator.
Get a cheap digital voltmeter put it on the DC volts range. Place the red lead on the positive terminal of the battery and the black common lead on the negative terminal. Jump start the car again to get it running. If the battery reads in the range of 13.6 Volts DC volts then the alternator is supplying enough power to charge your battery. The alternator must generate more than 12 volts Direct Current to charge a battery. Also check the belt is not slipping on the alternator pulley.
Have the charging system checked. Maybe the new alternator isn't charging. Is your battery light on when running? If you put a voltmeter across the battery terminals when engine is running, you will know if alternator is working or not. You first should have the battery charged up. Voltage should read at least 13.5 volts, engine idling. If you just get battery voltage, say 12.6 volts, alternator is not working:. Check all battery and alternator connections for a clean, tight connection. Battery cables and connections should be inspected. Check for any blown fuses, your truck may have fusible links- if any are bad, you need to replace them. They would be located close to the battery, as they serve as power distributors. Good luck.
Its a fairly simple system. The alternator gets a signal from the circuit for the warning light and-or gauge to activate the voltage regulator inside the alternator. The large wire between the alternator and the battery or starter is fused for protection. Could be a problem with that circuit back to the instrument cluster, or the circuit to the battery, or a ground connection. You could also have a second defective alternator.
SOUND LIKE DEAD BATTERY.CHECK BATTERY CABLES MAKE SURE THEY ARE TIGHT FREE FROM CORROSION.CHECK BATTERY VOLTAGE IT SHOULD BE 12.5 VOLTS.IF NOT CHARGE OR REPLACE BATTERY.MAKE SURE ALTERNATOR CHARGING BATTERY.WITH ENGINE RUNNING USING A DIGITAL VOLTMETER HOOK TO CAR BATTERY YOUR VOLTAGE OUT PUT SHOULD BE 13.5 TO 14.5 VOLTS.IF NOT CHECK ALTERNATOR FUSE AND ALTERNATOR WIRES MAKE SURE NONE OF THEM NOT LOOSE OR BROKEN.MAKE SURE DRIVE BELT NOT LOOSE.TURN OFF RADIO BEFORE REMOVING THE NEGATIVE BATTERY CABLE.IF BATTERY AND ALTERNATOR GOOD CHECK THE IGNITION SWITCH FUSE.IF SWITCH FUSE IS GOOD.IGNITION SWITCH IS OPEN NEED REPLACING.DISARM AIRBAG IN STEERING WHEEL FIRST BEFORE REMOVING IGNITION SWITCH.REMOVE BATTERY NEGATIVE CABLE WAIT 20 MINUTES TO ALLOW AIRBAG TO DISCHARGE BEFORE REMOVING THE IGNITION SWITCH.