Question about 1994 Oldsmobile Cutlass Supreme

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Oldsmobile Draining Battery

Just replaced alternator and battery, but my voltage gage still reads around 12 and will drop steadily as rpm increases. this problems sometimes goes away and the car runs fine, other times the voltage will get so low (8 volts) that the car will almost die on me. any ideas would be nice

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  • twineman89 Mar 15, 2009

    I have a similar problem. My olds will run just fine sometimes but lately i can go down the road and watch the battery guage drop way down. If i run the radio, try putting the windows up/down or anything else that uses the darn headlights then it'll die on me going down the road.
    Sometimes it'll do that, then it'll run fine and be back & forth when i go somewhere so it's got to the point that it's too dangerous to drive right now.
    I had a guy hook up some handheld computer thing awhile back under the dash to read some error codes or something. Not sure why he did since he was fixing my brakes but I remember he said it showed my O2 sensor was going bad. I'm thinking he told me that if it went out that it could make the car just die while driving it.
    I'm not sure what that'd have to do with it wanting to die while using anything that took power but I don't know much about cars at all.
    I'm fixing to replace the alternator soon. Just had it rebuilt but the guy broke the mounting bracket so gotta do that too, but I pray that fixes it.
    Any advice would be greatly appreciated:)



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You will need to check for battery voltage at the back of the alternator. The larger red wire.

Posted on Feb 27, 2009


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