What Can Cause Alternator Not To Charge. Also when the revs go past 2 rpms the battery light comes on. Alternator overcharging is not safe or suitable for your vehicle.
Regardless of the condition of the alternator if it is not. Answer 1 of 6. Symptoms of alternator overcharging can be very hard to notice in your car.
Answer 1 of 6.
However if an alternator does fail on you then youll know it fairly quickly as your electrical systems. I wanted to check my alternators output directly so I found the positive cable uncovered the rubber housing and put my multimeter lead on the nut then I grounded it. Technically a bad alternator can provide enough power to keep the car running just not enough to charge the battery for an easy car start. A charging system voltage drop check can help you locate the source of an under-charge or over-charge condition due to problems in the wiring or connections between the battery and alternator.
