What can happen to the output voltage of alternator if the battery is disconnected?

If you have a newer battery but your car won’t start, you may have a bad alternator. The second you disconnect the battery, the voltage regulator pegs the alternator to put out maximum power. With no battery in the circuit to act as a buffer, the alternator can put out up to 150 volts, depending on engine rpm.

How many volts should a disconnected car battery have?

Check the voltage. A good car battery should read 12.4-12.9 volts when the car is off.

How do you charge a positive ground battery?

Re: How do you charge a positive ground battery? A positive ground car’s battery is just like every other battery in the known universe. When you charge them on the car you hook the charger up just like any other car, pos to pos, neg to neg. The positive side in this case is the car body.

Will car battery stay charged if disconnected?

This is because they will be getting power from the car battery even when it is off. This is why batteries lose charge even when the car is sitting. However, you need to keep recharging the battery over time. Ideally, the battery should be recharged every 12 weeks when the battery is disconnected.

How many volts will a car battery lose overnight?

Shouldn’t go much below ~12.6v and can go up to 13 to 14+volt while running/charging. Any decent car battery will only lose at most 0.01V maximum, the security of the car will draw some current but it should only be low.

Why positive terminal of battery is grounded?

The ground in a circuit refers to a reference terminal with zero voltage. Hence, when the positive terminal of the battery is connected to the ground with zero potential, there is flow of charges from the positive terminal of the battery to the ground at zero potential.

How do you jump a car with a positive ground?

How to jump-start a car steps:

1. Clamp the positive (red or yellow) cable to the positive terminal of the weak battery.
2. Clamp the other end of the positive cable to the positive terminal of the good battery.
3. Clamp the negative cable (black) to the negative terminal of the good battery.

How long can I leave car battery disconnected?

How long will a car battery last if disconnected? The maximum lasting time of a car battery when removed is around 6 months. Nonetheless, car owners should recharge their disconnected batteries from time to time for them to last.

How long can a car battery stay disconnected?

A disconnected battery can last for six weeks to six months. If you do so, you may need to keep recharging it over time. It would be a good idea for you to charge your battery every 12 weeks if you have it disconnected. This way, you can keep it in good condition, ready for future usage.

Why does my 6 volt generator not show charge?

If the ammeter does not show charge, the generator is defective. Note the generator may have shorted out the regulator when it went bad. Since the 6 volt regulators are still mechanical and can be set, it may be beneficial to know what is where inside them.

Can a bad ground wire cause a car battery to not charge?

The ground is a major part of the battery’s charging system, so assuming that you’re getting proper voltage output from the alternator wire, and the battery isn’t hashed, then you may be looking at a bad ground wire. If the ground wire is loose, then the alternator won’t deliver its full power to the battery, particularly at idle.

Can a car battery be switched positive or negative?

Nothin on the electrical system can or will work with a ground absent. and to support this further, modern computerized cars typically switch the ground for the loads, rather than the hot or positive. Seems those ECU’s/ECM’s like to be grounded, so not only are they very well grounded, but they’re switching the battery negative.

What happens if you ground a generator and charge it?

If the generator charges when you ground the field it’s possible to rig up a ground on the field terminal to charge the battery in an emergency. Remembering that this will cause the generator to go to full charge, it is only logical that such action will cause the generator to overheat.

Can You charge a positive ground car with a negative battery?

When charging positive-ground cars, put the positive cable on the ground and the negative on the battery or starter lug. If you want to jump start a 6 volt positive ground car, the best way is to use another 6 volt battery of either polarity.

Can you run a 6 volt car on positive ground?

Positive goes to positive and negative goes to negative. This makes a parallel circuit. But make sure neither car touches each other! You can use a 12 volt battery to jump a 6-volt system with two precautions. Do not run the vehicle with the 12 volts, and have someone ready to yank the cables as soon it starts.

When to disconnect positive terminal on car battery?

Disconnecting the positive (or negative if you want less risk of shorting tools to chassis) terminal during the night often gets around most discharging problems but would have little effect if the battery itself is self-discharging internally which sometimes happens.

What does a positive ground battery system mean?

positive ground battery system?? Essentially it means the battery is installed “backwards”. The positive terminal is the ground and the negative terminal is the live. Many cars were set up this way. All Ford, Chrysler and Hudson cars and all English cars for a start.