Question about 1998 Chevrolet S-10 Pickup

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My battery gauge fluctuates when the rpms are high and between gears if i dont shift soon enough. All lights inside also dim. I had the alternator tested and its ok. Battery is new. Any ideas of what it could be??

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Check earth lead from battery witch runs to car body then to engine block sounds like a bad connection along this cable
hope this helps

Posted on Dec 10, 2009


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1 Answer

Battery charge

This usually indicates the battery has a shorted cell. Here is how you can test it. With the engine not running, take a digital voltmeter set to volts function and read the battery voltage. It should read at least 12.3 volts. If the first two digits are 11, then your battery is bad. If you show a battery voltage over 12.3 volts, then you probably have a bad alternator. Beyond that, I need more details, like, does the engine crank ok? Are headlights dim when engine is stopped? What does "battery gauge very high" mean? What is the make of the vehicle?

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Recently i hear noise coming from under the hood, when my rpms are high, the gauges start dimming. Could it be my alternator? Belt looks good. battery gauge level is right.

If the lights go dim while driving then the charging lights should come on and that means either the relay is braking down or the regulator in the Alternator is braking down .
Its quicker and cheeper to get it checked out by a elect shop than buying a Alternator and still having the problem after, as the alternator should charge about 13.5 volts while running.. Ron

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Headlights and interior lights flicker

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