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What causes the Ford Taurus battery light to come on at low RPM?
The battery light tells you the system is not charging, if it comes on at idle or low rpm it is likely a weak or failing alternator. The idle being too low can also cause it to come on.
What causes the battery light to turn on above 2000 rpm and off below 2000 rpm when a new alternator and battery were installed on a Mercury Tracer two weeks prior?
The RPM change affecting the light seems to indicate that it's the alternator. Perhaps it has a bad voltage regulator? Maybe it's not the right alternator for your car?
When2000 Ford Taurus battery light comes on you rev the engine and the light goes off why?
As rpm increases voltage climbs putting out the light.It is a pour alternator even though they are relitvely weak chargers.This is assuming the idle rpm is not too low i
Why does the battery light on a 2002 Civic LX come on when started goes out at exactly 4000RPMs and then will come back on at 2500 RPM even after the battery was replaced?
This is not a battery problem. Your charging system, the alternator, is not putting out enough juice to charge the battery until you reach 4000 rpm. Have the alternator and charging system checked.
How do you compute the rpm of the alternator?
Crankshaft pulley diameter X RPM / alternator pulley diameter = alternator Rpm
What does it means when your car rpm gage come on and the check engin light to?
My rpm light came on but not my check engine light so what does that mean when the rpm light is on
How does an alternator cause a negative draw on the battery rather than charging it It's a 90 Buick LeSabre 3.8. It produces an output charge during idle but draws on the battery in high rpm driving?
The alternator will not draw power from the battery but the rest of the vehicle systems will. If your alternator is not functioning properly the battery takes the toll.
Why would the battery light flicker when accelerating to 3000 rpm?
Sounds like the brushes are worn down in the alternator.
Why do your lights dim when your RPM decreases?
Because the voltage drops. Depending on what is the problem changing the battery or alternator will help.
Will a bad battery cause your car to lose power at higher rpm will it idle low at a stop?
No, but a bad alternator will.
If you reverse polarity on the battery and the fuses are fine and the alternator check out ok why would an 81 Toyota pick-up wont stay on whithout having your foot on the gas pedal?
When the truck is idling at low RPM, the charge supplied by alternator is not sufficient to run truck and charge battery of reverse polarity. Alternator expends majority of amperage toward charging (which never takes) and increase in RPM is required to spin alternator fast enough to accomodate ignition system and charging system in unison. When the truck is idling at low RPM, the charge supplied by alternator is not sufficient to run truck and charge battery of reverse polarity. Alternator expends majority of amperage toward charging (which never takes) and increase in RPM is required to spin alternator fast enough to accomodate ignition system and charging system in unison. When the truck is idling at low RPM, the charge supplied by alternator is not sufficient to run truck and charge battery of reverse polarity. Alternator expends majority of amperage toward charging (which never takes) and increase in RPM is required to spin alternator fast enough to accomodate ignition system and charging system in unison.
How fast does a car alternator need to spin to recharge a battery?
usually at high idle 1500 rpm for about half hour
