Question about 1992 Oldsmobile Ninety Eight

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Decreasing battery voltage

I have a 1995 jeep cherokee and yesterday the battery voltage decreased so much that the car hardly had any power and when I gave it gas it only went like 10 mrh. Also before that happened, the radio started going on and off. Is this a wire issue? Also the dashboard light became very dim and the headlights also? What is this? Please help me

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  • 341 Answers

The problem sounds like your alternator is bad...check to see if belt is ok

Posted on Dec 10, 2008

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We have a 1995 Jeep Grand Cherokee,ran good then quit,has 8 volts to the coil,the coil isn't firing.Has new parts inside the distributor,new coil,a computer off another Jeep Grand Cherokee,has the same...


If there is only 8 volts to the coil, that is your problem. There should be battery voltage (12.2) volts to the coil with the ignition switch turned on. Connect a voltmeter between the DARK GREEN/BLACK wire at the ignition coil and the POSITIVE battery post. Turn the key on. If the volt meter reads more than 0.3 volts then you have a voltage-drop (high resistance) problem on your coil B+ circuit. The coil is powered by the Auto Shutdown (ASD) relay - this is the MOST LIKELY source of high resistance in this circuit.

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Battery problem


Check the battery for a draw, if you know how to use a Ampere meter, put it inline and make sure all doors are closed, and if the car has a lamp under the hood disconnect it. With the Ammeter in line, you should see a reading on the meter.
If there is a reading, disconnect the amp power connector and the reading should drop. If it does, you may have to install a power relay to control the amplifiers to ensure they do not drain them in future.

The second possibility is that the power consumption of your amps is preventing the battery from charging completely. Especially if the battery has bad cells. It would be helpful to know what amprerage your alternator is putting out and what the amperage draw of your amps are while in use.
Of course if demand is higher than supply then the battery will have difficulty keeping up.

One quick check is to check battery voltage with a meter, start the car, check the voltage is it around 13 volts and increasing, turn on the amps, again check the voltage, is it still increasing or decreasing. Rev the car up a few rpm's If it is decreasing then you are taxing the charging system.
Replace the battery and try these tests again.

Hope this is of some help.
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sounds like electrical problem check battery connections,altenator output, fuses,connectors and wiring in that order sometimes that is caused from low voltage on system thats the reason to check battery and altenator voltages hope this helps

Sep 03, 2008 | 1995 Jeep Cherokee

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