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2ES-Battery warning but still fully charged?

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Old 10-21-08, 02:01 PM
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eyezack87
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Default 2ES-Battery warning but still fully charged?

So today it came on while I was driving, well, it was more like flashing on and off. So, knowing me, I started freaking out on the way home thinking that it would die on me (which has happened to me in the past in another car ) but I get home fine luckily.

Now, I checked the voltage with those Ohmmeter's and it checked out at 12.65 volts. I'm honestly confused at what is happening now since everything checked out for the battery for what I could see. I even fired up both HID setup's that I had on the car no problem

Any idea what caused this? If it helps your answer, I have HID lows and fogs that use a relay harness to the battery. Those are fine too
Old 10-21-08, 02:37 PM
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JSM1284
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Whats the voltage read with the car running?
Old 10-21-08, 02:49 PM
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13.55 with everything off except the engine

12.35 with engine, AC, radio, both HIDs on
Old 10-21-08, 03:04 PM
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JSM1284
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You need an alternator. It should be putting out around 14.4-14.7 from the alternator.

A free electrical check at autozone should confirm
Old 10-21-08, 03:29 PM
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Just got back from there. They checked voltage and alternator and said it was good?

I'm confused now
Old 10-21-08, 03:42 PM
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ES3_Ray
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i second that the alternator is bad.
12-13.7VDC is pretty low for when the car is operating. if u dont want to replace the whole alternator you can always buy the voltage regulator and brushes and rebuild it yourself.

according to the 98 book, the voltage should be 13.2-14.8 V while running at 2000RPM

hope this helps.
Old 10-21-08, 10:25 PM
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Cool, thanks guys. I guess I should bring it in for service before my next big trip then....
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