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If the answer below doesn't solve the problem, have the alternator checked, as the regulator may not be working properly. Have it checked fairly soon, as fluctuations like those you describe can harm the car's computer and electronics. Clean both battery cables good and make sure there is a good ground between the engine and body. This ground is important so make sure it is tight and clean {no paint or grease}

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โˆ™ 2006-12-18 03:00:22
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Q: Why would the voltage indicator fluctuate between 15 and 18 at all times and all lights go bright then dim and the battery light flash?
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Related questions

Can the voltage of an alkaline battery be an indicator of remaining energy?


I have 2004 Chevrolet trail blazer and my battery light indicator is on-?

If you have 2004 Chevrolet trail blazer and your battery light indicator is on, it is probably because of voltage across the battery is 12.1v.

When a battery becomes undercharged in a vehicle that is driven regularly... Why does the charge indicator light remains off with the engine running?

The charge light responds to the battery voltage. When the battery is NOT being charged, the battery voltage is a pretty good indicator of the charge state, although temperature will change the voltage a bit. When charging occurs, the voltage jumps up for several reasons. First, the charging reaction itself. Chemicals are being changed. Second, internal battery resistance. The older and the more use, the higher the resistance will be. Third, terminal resistance. There may be corrosion between the terminal and the attaching connector. The charging current goes through these resistances and raises the apparent voltage. These voltage increases fake out the indicator. The voltage under charge is higher than it should be, saying, "I'm all charged". To bypass all of this, turn the car off and measure the voltage right at the battery terminals, with no current flowing.

What makes the voltage gauge fluctuate when the turn signal is on?

A short in the turn signal wiring can cause the voltage gauge to fluctuate. A loose ground wire can also cause the gauge to fluctuate.

Why does your battery indicator show red?

Red means that the battery charge level is low or that the alternator is not charging battery properly. Check alternator, voltage regulator, connectors.

Does voltage fluctuate for a semi acoustic guitar when playing?


Why voltage regulation is necessasory?

Voltage may fluctuate due to improper wiring/groundings or sometimes due to sudden load changes. So as to give constant output voltage we need voltage regulation. If we let the voltage to fluctuate then it might cause damage to the equipments

Why would your alternator fluctuate on a 2000 gmc sierra my alt crapped out and i changed it twice and both times the voltage fluctuates and the battery light flashes connections and battery good?

voltage regulator, sometimes its in the alternators, advance auto parts doesn't replace them in remanufactored ones.

What does a battery create between terminals?

Potential difference (voltage)

How much should voltage fluctuate on an alternator?

As little as possible

Can you change a 230volt adapter to 240?

230 volt is the same as 240 volt. The voltage in households will fluctuate between 220 and 240.

A battery produces voltage using?

battery produces voltage by

What does charge system mean on a 1992 ford aerostar?

The Charging system includes the alternator, either an internal or external voltage regulator, a charge indicator, the battery, a fusible link, and the wiring between all of the components.

How much voltage does a AA battery have?

An AA battery has 1.5 voltage.

Difference between current and voltage charging?

Voltage charging is when you set a specific voltage to charge a battery. Regulate voltage and the system will draw what ever current it requires. Current charging is when you force a specific current through a battery not concerned about what voltage is required to maintain the current.

What is a voltage of a battery?

It is the potential difference between the positive and negative terminals of the battery. The unit of electrical potential is the volt, so the difference in potential between two ponts is also a quantity with units of volts, colloquially called the 'voltage' between the points.

How much voltage the alternator of Skoda octavia gives?

the alternator voltage at the battery should be between 12.4voltsv-13.6 volts

What is the voltage between point p and the battery?

The voltage between point p and the battery is not able to measured exactly. You can never measure the absolute electric potential at any point. its just not possible. That is why we talk about difference in potential.

What causes the red indicator light to come on on the voltage guauge on a 1994 buick park avenue?

Vehicle charging voltage too low or too high or monitor circuit faulty. Check battery with voltmeter.

What is the difference between a battery charger and a transformer rectifier?

A battery charger is a DC voltage source followed by some kind of regulator that controls the current flowing into the battery. Depending on the type of battery, this regulator might be simple, based on current and/or voltage, or it might be complex, based on voltage slope. A transformer rectifier is simply one of the part of the DC voltage source.

What is the relationship between voltage across a battery and voltage across each load in a series citcuit?

The voltage across each load will be a percentage of the voltage across the battery, depending on the percentage of the total load each individual load is. The voltage across the battery is equal and opposite to the sum of the voltages across each load in a series circuit. This is Kirchoff's Voltage law: "The signed sum of the voltage drops in a series circuit is zero".

Does the size of battery indicate a high or low voltage?

bigger the battery higher the voltage

When the voltage difference between any 2 cells in a battery reaches 0.5 volts the battery usually must be what?

Recharged or replaced

What is the electric current from a battery?

The current flowing from a battery is equal to (Voltage between the battery's terminals)/(Resistance of the circuit connected to the terminals)

What is the difference between 2amp 4amp 6amp battery chargers?

The difference between a 2amp, a 4amp and a 6amp battery charger is the speed at which the battery will be charged. The numbers represent the maximum amperage output at a specific voltage at which the battery will be charged.