by GlassWolf » Fri Mar 09, 2007 5:00 am
the battery is used to start tha car, however if the battery has damaged cells from being drained too low, it will also prevent the car from holding a proper voltage rail.. and you'll see voltages like 11 or 10V.
The alternator does recharge the battery and supplies current to the car when the engine is running above idle RPM.
Here's the catch. If you ahve a newer car, and it sat for a period with a dead battery (similar to having no battery) the ECM in the car may need to be reset. You'll need to contact a dealer to find out if this is the case, but I know my Jeeps were like this, and showed similar behavior to what you're describing after the batteries were left disconnected for any period of time.
Also, your alternator is fine. If that were defective, you'd have a whole other set of symptoms.
the battery is used to start tha car, however if the battery has damaged cells from being drained too low, it will also prevent the car from holding a proper voltage rail.. and you'll see voltages like 11 or 10V.
The alternator does recharge the battery and supplies current to the car when the engine is running above idle RPM.
Here's the catch. If you ahve a newer car, and it sat for a period with a dead battery (similar to having no battery) the ECM in the car may need to be reset. You'll need to contact a dealer to find out if this is the case, but I know my Jeeps were like this, and showed similar behavior to what you're describing after the batteries were left disconnected for any period of time.
Also, your alternator is fine. If that were defective, you'd have a whole other set of symptoms.