Some vehicles have an external voltage regulator which also controls the warning lamp circuit, some vehicles have a warning lamp relay and others may operate through a computor, all of which require a signal from the alternator. You either have a faulty regulator/relay/computor, A broken signal wire from alternator, alternator is incorrectly wired or a faulty/incorrect type of alternator
yes if one of the wires was getting an earth from the alternator cover or rubbing off the engine the battery light is really an alternator light warning you that the alternator is not charging the battery
That is typically caused by a faulty alternator. Have the alternator tested; the light is indicating that the alternator is not providing a charge to the battery.
triple diodes in alternator are bad
Possible alternator problem
Can be loose or corroded battery connections, loose drive belt, or the alternator is failing.
Possibly the alternator is defective and not recharging the battery. Or something is on, pulling power from the battery when the car is not running. Can be any light or any relay that is stuck.
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. You may also have a battery drain (something that is staying on and killing the battery)
The alternator switches off
94 Buick Lesabre replaced battery and alternator and the alternator is not charging the battery. Battery light is on and off. Is this fusable link. If so where is it located
You possibly have a loose alternator belt or the alternator is weak. Check the voltage at the battery with the engine running. It should be 13.5 ? 16 volts. Any less and the alternator is weak and needs replacing. Also make sure the connections at the battery are clean and tight.
A failing alternator.
If alternator and battery test fine- then you may have a bad fusable link not allowing the alternator to charge the battery
the diodes in the alternator have gone
Check your alternator, that would be the main problem i think because the alternator charges your battery when in use, and with a bad alternator, means that your car is runnin soley off the battery and does not recharge the battery. Look into getting a new alternator. try testing the alternator at a local auto parts store, another test you could do is start the vehicle , and while it is running take off the battery cables, if motor turns off immediatly then your answer is that you have a bad alternator
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?
Alternator is sending to much volts to battery. Suppose to turn itself off when battery gets to around 13 volts. May need new alternator.
It's alternator time.
have the alternator circuit checked
usually means that the alternator is not charging. So the battery is being drained.
more than the alternator diode is bad have the alternator checked
Because your alternator starts to generate more power as you accelerate, as opposed to an engine at low speed or idle. The car reads this extra voltage from the alternator, which is trying to charge the battery, and tells the light to go off. This is not normal on a vehicle with an alternator. You need to have the alternator checked as it more than likely needs replacing.
Clean both battery cables and check the connections on the alternator. If it continues, go to auto zone and have the alternator checked.
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt.
When this light stays on, it is telling you the system is not charging. Possible bad alternator, battery, or loose or disconnected wire.