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How do you wire an alternator to charge the battery on a boat with a Perkins 4108 engine?
Large terminal on alt goes to battery pos, small wire on alt goes through bulb to ignition switch feed. When alt is not turning the ignition feed goes through bulb to small term, which is earthed through alt hence light is on when ignition on but engine stopped. When engine starts the alt creates 12v volts on small which breaks earth and turns light out. Alt will not work without 12v ignition feed to small term as power is required to start charging process. Tried to simplify it down, hope it helps.
What else can I help you with?
Does the motor charge the battery when you run the engine?
No, the alternator recharges the battery. Of course the alternator is turned by the engine.
How do you use the rotational motion of a wheel to charge a battery?
Start the engine up. The engine will rotate the pulley on the alternator and charge the battery.
What cause alternator not to produce power to start engine?
The alternator produces power to charge the battery. The battery powers the starter to turn the engine over.
What should you do if battery was not charged before installing new alternator?
My advice is to charge the battery with a battery charger before starting the engine. You will be putting a heavy load on the alternator if you allow it to charge a dead battery. This could damage the alternator.
Does an alternator charge a battery while the car is not running?
No , just when the engine is running
Will a car start if the alternator is going out?
It will start if there is enough charge in the battery to turn the engine over. However if the alternator is weak then the battery will not be charged fully.
Why new battery and alternator won't hold a charge when car is running?
The alternator does not hold a charge. It charges the battery. If it will not charge the battery then either the alternator is defective, battery is defective, or the connections are corroded or loose. You should read 13.5 to 15.5 volts at the battery with the engine idling. Check it with a DC volt meter. If you get less the alternator is defective. If you get much more the voltage regulator is defective.
Why does the engine make noise when the lights are turned on?
Alternator straining to maintain battery charge?
Can my car start with a recharged battery if my alternator is bad?
Yes, the battery starts the engine, and as long as the battery is fully charged the engine will start. The battery will loose it's charge if the alternator is defective and not replenishing the charge of the battery but the alternator has nothing to do with starting the engine.
Will car turn over if bad alternator?
Yes, as long as you have a fully charged battery and good starter the engine will start even if the alternator is defective. The engine will run until the battery looses it's charge, which it will. if the alternator is bad.
Will battery recharge after bad alernator is replaced?
An alternator is designed to keep a fully charged battery at peak level. It is not designed to charge a dead battery. Installing a new alternator on a car with a dead battery can in some cases ruin the new alternator. Fully charge the dead battery before starting the engine.
Can a loose positive battery cable prevent the alternator from charging the batter and can it cause a battery drain while the engine is not running?
Yes, a loose battery cable will prevent the alternator from charging the battery. The drain on the battery is not caused by the engine not running unless an accessory is left on. Most likely, the drain is caused by accessories (radio, lights, etc) while the engine is running due to the battery not receiving its charge from the alternator and then not having enough charge left to start the engine.
