Alternator putting out too many volts

The voltage regulator is usually found inside or on the back of the alternator case. If the alternator is putting out too much voltage 15 volts it is likely your battery acid will boil over out of.

As a result the alternator will run too hard and overcharge the battery.

Alternator putting out too many volts. What causes an alternator to put out too much voltage. If you are getting more than 2 volts above base voltage most likely your alternator is over-charging the battery or the battery is faulty. Other potential problems are a faulty voltage regulator or a problem in the charging system wiring.

What causes an alternator to put out too much voltage. If you are getting more than 2 volts above base voltage most likely your alternator is over-charging the battery or the battery is faulty. Other potential problems are a faulty voltage regulator or a problem in the charging system wiring.

How many volts does a 12 volt alternator put out. A car alternator needs to be putting out at least 13-14 volts ideally between 138 and 142 volts to effectively charge a 12 volt car battery. If the alternator is putting out too much voltage 15 volts it is likely your battery acid will boil over out of.

Alternators are designed to put out too much voltage. Thats why a thing called a regulator is needed. The regulator adjusts a voltage to the field winding of the alternator and this sets the output voltage.

If you got too much output your regulator has failed. Alternator putting out too much volts Dash multimeter show the same volts. Took readings at alternator and at the battery both show 12v at idle and after revving for a minute itll jump to 18v.

There is what looks like a regulator on the back side of the alternator. Wirring not messed with. 18 volts will kill your battery.

Your problem is a bad regulator which is generally inside the alternator. If you do have an external regulator replace it. If its internal you could replace it but I suggest replacing the alternator.

Above 145V to 147V you can get excessive gassing and related corrosion depending on the battery type. The Powermaster may be a noisy alternator thats your real issue. There are modern Chrysler alternators that are much quieter and more suitable for fuel injection electronics.

It might need to put out that high of a voltage to get 14 Volt at the battery due to very poor connectionslossesheat build up. If you do get only 14 Volt or so on the battery when the engine is running and assuming you still have 19-20 Volt on the alternator you are looking at going through your complete wiring harness and connectors bulkhead connector especially to check and clean the contact. All too often the alternator is condemned as the source of the problem if only battery voltage is present with the engine running.

If this is the case it only means that the alternator is not charging but does not reveal why. For some alternators its normal to see as low as 13 volts. If the alternator voltage output is high youll get.

An unpleasant sulfur smell from the car battery. Headlight lamp bulbs tend to burn out more than usual. Also can cause unusual behavior with car electronics.

What should I do if the alternator voltage output is too. Measure voltage between alternator frame and batterys negative terminal. More than about 110 volt says theres a grounding issue.

Some alternators are single wirenot counting the frame ground and produce around 145 volts at their output terminal assuming theres not much voltage drop between there and the battery. You are correct 18 volts is much too high but an alternator can not cause over-charging unless it is assembled incorrectly with one of the brushes grounded through its mounting screw. Over-charging is caused by the voltage regulator driving the alternator too hard.

Theres two possibilities for this condition. Herein what causes an alternator to put out too much voltage. Typically one of two problems cause overcharging alternators.

Poor battery condition and failed regulators. When a battery is already getting old and worn down the alternator may run extra hard to increase its charge. As a result the alternator will run too hard and overcharge the battery.

Without a voltage regulator an alternator may put out up to 250 volts. This is enough to destroy the cars battery and electrical system. The voltage regulator is usually found inside or on the back of the alternator case.

A car alternator needs to be putting out at least 13-14 volts ideally between 138 and 142 volts to effectively charge a 12 volt car battery. If the alternator is putting out too much voltage 15 volts it is likely your battery acid will boil over out of the battery. How many volts should a alternator put out.

A car alternator needs to be putting out at least 13- 14 volts ideally between 138 and 142 volts to effectively charge a 12 volt car battery. If the alternator is putting out too much voltage 15 volts it is likely your battery acid will boil over out of. It matters where the voltage is measured.

If you measure the voltage close to the alternator it can be greater than when measured in the battery terminals. The reason is Ohmic voltage loss. To save costs wires in cars are typically thin and the voltage loss can be great if theres a lot of electrical load.

Alternators arent the cause of too much voltage. Ive seen perfectly fine alternators put out up to 50v before without the voltage regulator. The voltage regulator is what keeps the voltage at around 14v by repeatedly opening and closing the circuit if it is staying closed too long the alternator with produce too much electricity.

No too much electricity will not cause a car to idle higher. You can also run some old 6 volt systems with a 12 volt genalternator the question is whether its a good idea If as in the case of the op your battery is boiling bubbling acid all over your engine inner fenders - and it bothers you. Then it might be a good thing to throttle it down.

How much voltage should a 12 volt alternator put out. A car alternator needs to be putting out at least 13-14 volts ideally between 138 and 142 volts to effectively charge a 12 volt car battery. If the alternator is putting out too much voltage 15 volts it is likely your battery acid will boil over out.