Car lights get power from the batterie in the car, or in some cars oil gives car lights power.
cold cranking amps is the rating on a car battery- the higher the number of cca the stronger the starting power of the battery
The colder the temperature , the less cranking power the battery has
The test I always use to figure out if it's the battery or not is turn on the lights and try to turn over the car. If the lights go dim while your cranking the motor then it's probably the battery. If not you need to check the fuses and then call the warranty line to Nissan it may still be under warranty.
If the timing chain or belt jumped time one tooth or notch it would lose most of it's power. If it jumped two teeth or notches it wouldn't have the power to move at all.
When your lights are on and your engine is not running you are taking the power for your car lights directly from your battery. If you leave them on long enough, you will run down your battery and your car will not start. Then you will need a jump.
With a battery or solar power!
NO.
this question makes no sense ? i assume you mean prevent the car from cranking??? if so then no. a bad fuel pump may stop the car from running or starting but it should not stop it from cranking. a bad fuel pump relay could stop the car from cranking but that would depend on the year make and model of your car.
Headlights, since they require more power than the inside lights of a car.
Cranking amps determine the amount of power that it takes to start a car in most climates. The amount of cranking amps that a battery for a 2003 Jeep Grand Cherokee has would entirely depend on the type of battery that the vehicle has.
check battery and alternator