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Old 06-24-2006, 07:43 PM   #1
DetroitBass
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Join Date: May 2005
Fan#: 23602
Location: Detroit
What I Drive: 2000 Red ZX3

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WEIRD Battery light on, but no problems...?

My battery light came on, and has been on, all day today while I have been driving. I know this usually means bad alternator, weak bateery, or loose wires somewhere.

So I bring out the DMM and do some testing. After I first noticed the battery light come on, I have to drive about 5 miles to home. Figure the battery (Optima Red Top, about 8 months old) would show a decent amount of voltage loss if the alternator was bad. Put the DMM on it, and about 13v..... weird.

Start the car up, test the voltage on the battery again..... 14.5v.... double weird. The alternator is running fine, putting out full power. I turned on the radio, headlights, AC, etc, and hardly ANY voltage drop at all.

Check all wires, power ground, etc, and everything is fine. I have now driven for about 60 minutes or so with the battery light on. When I turn the car off, battery still reads about 13v.

So WHY THE HECK IS THE BATTERY LIGHT ON?

also, I have turned the car off and restarted multiple times, and the light is on everytime. The car has no problem whatsoever turning over, starts like usual. I'm starting to think there might be a problem with the bulb for the battery light!


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