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Why is voltage dropping slowly after installing a new alternator and a new battery on a 2002 Ford Focus SE?
Did you install a new voltage regulator? Is the belt tight? Maybe the "computer brain" is weakening.
Answer
If you have installed a new alternator and new battery, check the harness/wiring that plugs into the alternator, it may be corroded/bad connection causing your battery to not be recharged at idle speed; voltage should stay between 12-14.5v range and steady (some momentary drop may occur after turning hi beam lights, etc but it should return to proper voltage after a few seconds), as for the regulator, on most cases it is inside the new alternator so no further adjusting may be required; also, make sure you get the right alternator for your focus-there's like 3 types, the wrong one will cause your dashboard alternator lamp to be lit at all times-replace with right one or higher output if got power windows,seats,etc.Good luck! Buena Suerte!
What else can I help you with?
Will a voltage regulator kill a battery?
Two things can happen. 1. the voltage regulator fails so that the alternator doesn't know the battery charge is dropping therefore the battery doesn't get charged. 2. The voltage regulator fails in such a way as to allow the alternator to overcharge the battery which causes the battery to overheat and fail, Sometimes an overcharged battery can explode.
Can running a new alternator on a half charged battery cause damage to either the battery new alternator voltage regulator etc?
Not likely, but running the engine with a dead battery can damage some alternators. Always fully charge the battery when installing an alternator.
Why does your battery gauge keep dropping to zero on your 2003 Monte Carlo after you have just replaced the battery?
Bad alternator not charging battery? Bad voltage regulator? Blown fusable link?
Does alternator on weak battery affect the RPM?
If you have the wrong size battery in a Cadillac with the northstar will it effect the alternator voltage?
Why voltage regulation is required in alternator?
To regulate the voltage flow going to the battery.
Why does my Car stall when you unhook the battery?
It means that you have an alternator fitted. An alternator needs an amount of battery voltage to generate electricity. A generator/dynamo will make voltage without a battery being present.
Would an alternator burn a battery up?
If the voltage regulator (usually located inside the alternator) were to go bad and not limit voltage to the battery quite possilby _yes
How much voltage the alternator of Skoda octavia gives?
the alternator voltage at the battery should be between 12.4voltsv-13.6 volts
What causes alternator not to charge battery?
Defective alternator or internal voltage regulator is bad.
On a F-450 what causes the alternator to not recharge the battery?
either the alternator or the voltage regulator are no good.may also be a bad battery
How does an alternator keep a cars battery charged?
An alternator has diodes which transform ac voltage to dc voltage so that the battery gets negative and positive current on its poles thus making the battery to be charged.
How do you know if the battery is no good on a 2000 ml320?
Should really charge it then test it with a proper battery load tester. All you can do on your own is get a multimeter and check the voltage. Without it running and having sat for a 1/2 hour or so the voltage should be approx 12-12.5 volts. Start the engine and if the alternator is good the voltage at the battery terminals should be 13-14 volts. If without the engine running the battery voltage is 12 or less this may indicate that the battery is not holding a charge. Even then the voltage should go to between 13-14 volts when engine is started showing that the alternator is working to charge the battery. If when started the battery voltage stays around 12-12.5 volts or less I would suspect the alternator. Just to double check there is the main power out terminal on the back of the alternator. With the engine running check the voltage. If 13-14 volts is present at the alternator but not the battery the circuit in between the alternator and battery is suspect. If the voltage at the alternator is the same as at the battery (12-12.5 or less) the alternator or voltage regulator may be defective.
