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Could the problem be the alternator or voltage regulator if a battery won't hold a charge in a Mazda miata?
Wiki User
∙ 15y ago
Could be a bad battery Check the chatging system with a voltmeter--a fully charged battery should read approx. 12.8 volts without engine running With engine running reading should be approx. 13.8-14.2 volts
Wiki User
∙ 15y ago
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Why would your battery light stay on after you have put in a new battery and alternator?
The battery light comes on when the alternator output voltage is too low or too high. You have a wiring or regulator problem.The battery light comes on when the alternator output voltage is too low or too high. You have a wiring or regulator problem.
What is the problem when your change the alternator and its still not charging the battery?
Obviously check the battery. Anyway, if the alternator, battery, and wires connecting them are good the voltage regulator is next on the list.
How do you fix an alternator that overcharges your battery?
On most vehicles today the voltage regulator is built into the alternator. If that is the case then just replace the alternator. If the voltage regulator is external on your vehicle then replace the voltage regulator.
How can you constant the volt of alternator?
The voltage regulator has the job of making the voltage 'constant'. In most modern vehicles the regulator is located in the alternator, in older models the regulator is located separate. If your voltage is jumping around a lot then you either have a problem with the battery (batteries stabilize the voltage also)or the charging system (and probably the voltage regulator)
Replaced the battery on your 2000 ford explorer and the battery light is still on could it be your alternator?
Most likely the problem is your alternator....the battery light actually does not monitor battery condition, only the charging system. I'd check the voltage regulator and the fuses first. The fuses are the cheapest fix and the voltage regulator will run about 25% less than an alternator.
What causes alternator not to charge battery?
Defective alternator or internal voltage regulator is bad.
Buick lesabre new alternator battery will not charge?
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.
Where is the voltage regulator on a 1992 Chevy Astro?
the voltage regulator is built into the alternator, check voltage at battery connections should be 14.5 volts
What makes a battery and alternator over charge?
faulty voltage regulator
What is a likely explanation when an alternator is overcharging a battery?
Defective voltage regulator.
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.
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
