0
An alternator is designed to keep a fully charged battery at peak level. It is not designed to charge a dead battery. Installing a new alternator on a car with a dead battery can in some cases ruin the new alternator. Fully charge the dead battery before starting the engine.
Wiki User
∙ 16y ago
Add your answer:
Earn +20 pts
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
Can a bad alternator drain a good battery?
It doesn't actually drain the battery, but without a working alternator to recharge the battery it will only discharge as the car is operated.
87 supra replaced alternator still wont charge any ideas why?
You probably have a bad battery. You probably have a bad battery.
When an alternator goes bad does it ruin the battery?
YES. it will ruin your battery as the battery needs the alternator too recharge a full battery will last you 30-40 min maybe more or less depends.. it will drain your battery and make you stall (you mite be able too recharge later)maybe) if your alternator is bad YOU must get a new or used one ,its recommended if you get a new alt. get a new bat. as this will supply you years of trouble free from your car electrical issues.
Why wont your brand new alternator recharge your battery?
Maybe the battery is defective. Check the voltage at the battery terminals with the engine running at idle. You should get 13.5 to 16 volts. If not the alternator is defective or the voltage regulator is bad. If you are getting the correct voltage, the battery is bad or the connections are corroded.
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?
Why won't my1986 jaguar vanden plas battery won't charge?
If the battery is not taking a charge it is bad and needs to be replaced.
1996 Taurus battery charging light came on replaced the alternator and the problem seemed to disappear day later light back on battery not getting charged bad alternator?
you may have a bad battery or a bad voltage regulator
1970 Chevrolet truck wont start replaced the starter?
Dead battery? Loose or dirty battery cables? Bad starter solenoid? Bad starter? Neutral switch?
Will battery lose power if alternator is bad?
Yes, the job of the alternator is to recharge the battery and run all the electronics when the car is in use. If the alternator is defective and not putting out the required voltage to keep the battery charged it will soon run down.
When a battery goes bad does it ruin the alternator?
Not likely but as alterantor keeps trying to charge a weak battery it may wear out, however as you are not likely to keep a bad battery in the car for so long there should be no damage to alternator if battery is replaced.
Car wont start after replacing battery?
Replacing battery terminals??? How did you accomplish that. Do you mean you replaced the battery or are you referring to the battery cables? If you replaced the cables are you sure you have them connected correcty and tight. Especially the ground connection. Take a reading with an ohm meter from the neg battery post to the engine or chassis. If the circuit is open, you have a bad connection.
