first of all you spelled there wrong and if its keeps slipping off it must be old so it needs replaced
replace the voltage regulator
faulty voltage regulator
The alternator, in cooperation with the voltage regulator and the charge relay.
Defective alternator or internal voltage regulator is bad.
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.
A voltage regulator converts a/c volatge from the stator to dc voltage and regulates it down to under 15 volts. When they go bad they can over charge and take out a battery as well as not charge at all.
Sure, if the alternator voltage regulator is defective it can overcharge the battery.
either it does not charge the battery enough or it will charge it too much which will quickly cause the electrolyte in the battery to evaporate
The cause is the voltage regulator within the alternator (working normal). When the voltage higher it is charging the battery like after you start your car or have the headlights and wipers on. The voltage regulator keeps your battery charged up. In order to charge the battery, voltage must be higher than battery voltage.
battery tests good, alternator tests good, new voltage regulator installed and still no charge to battery from altanator .
Have you checked the fuses?AnswerMay be a bad voltage regulator. alternator is no good without a voltage regulator. that's what "turns on" the alternator.
If the regulator is bad, the alternator would have a low charge or a high charge or no charge at all. With a good battery that is fully charged (12.68 volts) and the engine warmed up and idling with no accessories on, you should get a voltage reading at the battery of 14.2 v (plus or minus .2 v).