Engine seized? Loose or corroded battery terminals? Flat spot on starter? Defective starter solenoid? Defective neutral or clutch safety switch? Defective ignition switch?
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.
Does it crank over fine?
The battery is used to start the car, and then the alternator takes over to keep the supply of power and to recharge the battery.
the battery job is to start the car so the alternator will kick in after the car is running
alternator?
If car cranks over and won't start it is not the starter, alternator or battery. Most likely the ignition wires or module, fuel delivery system or air intake meter.
That could be the alternator or the battery. Try jump starting your car with another car's battery. If it still does not start, it is probably the alternator. If it starts, your battery is dead.
the batteries only serve to start the car and the alternator. I'm not sure if it would be your alternator but it's not the battery.
As long as the battery is charged
Only disconnect it when ready to replace the alternator. The primary function of the battery is to store electricity needed to start the car. Secondarily, it stores electricity for use powering the electrical items on the car when the engine is off. If the alternator is not producing sufficient power to run the engine, the battery takes over. Once the battery is drained of its power, the engine will stop. You can jump-start a car whose alternator is faulty but battery is connected, and the car may run for a short time before the battery dies. If there is no battery, the car will start but not stay running once the jump device or cables are disconnected.
No, the alternator takes over for the battery once the car has been cranked. Try this, start the car; remove the positive cable from the battery; if the car dies, then you have a faulty alternator. Of course it makes sense to make sure the battery cables are tight at all times.
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.