Is 15V too high for a car battery?
Is 15V too high for a car battery?
So, to answer your question, Yes, 15 volts is too high. Most car alternators, that normally recharge your battery after every start, and provide power while the engine is running, are normally voltage regulated to about 13.8 to 14.0 volts.
Why does my voltmeter keep reading high voltage?
If the voltmeter is reading correctly, I’d suspect a loose or corroded connection at the battery, either end, or a bad cable. The spiking high voltage reading could mean the battery connection is gone and the alternator can then drive the voltage up way above the battery voltage. The battery acts as a voltage limiter.
Why does my voltage guage only show 9-10 volts?
My voltage guage usually points near the red mark at 9-10 volts. Batteries cranks the starter quickly and it does not seem to lack any electric power. Some times driving, it will raise to about 12 V, but never above, and the next minut point at 9 again.
Why does my alternator have a high voltage reading?
The spiking high voltage reading could mean the battery connection is gone and the alternator can then drive the voltage up way above the battery voltage. The battery acts as a voltage limiter. With the voltmeter connected to the alternator output and engine running, try wiggling the various battery cables.
Why does the voltage drop from 14 to 12?
After about 20 miles of a normal 14 volt reading it dropped again to 12 and stayed there the rest of the 80 miles home. So how or why would this never move from 14 before. Now that I was hauling a load with a camper up the hills that lead out of Phoenix, would the voltage drop to 11 or 12 and not go back up.
If the voltmeter is reading correctly, I’d suspect a loose or corroded connection at the battery, either end, or a bad cable. The spiking high voltage reading could mean the battery connection is gone and the alternator can then drive the voltage up way above the battery voltage. The battery acts as a voltage limiter.
The spiking high voltage reading could mean the battery connection is gone and the alternator can then drive the voltage up way above the battery voltage. The battery acts as a voltage limiter. With the voltmeter connected to the alternator output and engine running, try wiggling the various battery cables.
After about 20 miles of a normal 14 volt reading it dropped again to 12 and stayed there the rest of the 80 miles home. So how or why would this never move from 14 before. Now that I was hauling a load with a camper up the hills that lead out of Phoenix, would the voltage drop to 11 or 12 and not go back up.
When to troubleshoot an unusual voltage system drop?
Troubleshooting for Unusual Voltage System Drops Usually, the first sign that your charging system is in trouble is a “battery,” “ALT,” or “CHARGE” warning light illuminating on your instrument panel while driving. It means that for some reason, the alternator has stopped charging the battery and your car is running on battery power.
