Quick Answer: What Causes A Car Not To Start If The Battery Is Good?

How do you tell if it’s your starter or ignition switch?

Test the Starter It is under the hood, usually on the passenger side at the bottom of the motor next to the transmission.

The ignition switch is a set of electrical contacts that activates the starter and usually is located on the steering column..

Can a bad alternator destroy a new battery?

Can a bad alternator kill a new battery? Yes, very easily. A failing alternator can overcharge, which will damage the battery. An undercharging alternator will leave the battery flat, which speeds up its failure.

Why is my car not starting but the battery isn’t dead?

Whenever your car will not start and the battery is charged, the starter motor is usually the culprit of the issues. … It could also be due to poor connections, damaged battery terminals, or a bad or dead battery. Sometimes, this could even be due to the starter, with the control terminal becoming corroded.

Why does my car act like it doesn’t want to start?

If you hear a grinding clashing sound like trying to shift with a bad clutch, the starter drive gear or the engine’s flywheel (ring gear) may have damaged teeth. If the starter does not even turn, its relay or solenoid may be shot or the ignition switch could be the culprit.

How do you tell if its your alternator or your battery?

An illuminated dashboard light can indicate a problem with an automobile charging system. However, a very simple way to check if the alternator is working is to run the car and disconnect the positive terminal of the battery. If the vehicle stops running, then you probably have a bad alternator.

What does a bad alternator sound like?

Whining and Grinding Sounds If your alternator is failing, you could hear a few abnormal noises. If you hear a small rattling or grinding sound when your engine is running, this could be caused by a loose bearing in your alternator.

Why won’t my car start but battery is good?

Similar to the starter engine, a broken or damaged ignition switch can stop your car from starting. If your headlights can turn on, but your car won’t crank, that means that your battery is charged, but either the starter or ignition is the problem.

When your car won’t start but all the lights come on?

This is usually due to battery failure, poor connections, damaged battery terminals, or a dead battery. Another sign of your “car won’t start, but lights come on” issue is that you have to jiggle the key to start the car. This shows you have a bad ignition switch, and the solenoid is not being activated.

What causes no crank no start?

If the fuel pump, fuel injector, or fuel filter is damaged, this can cause the no crank/no start condition. … If the filter is clogged, the fuel going into the engine will be impeded. The last thing that could be faulty with the fuel system is the fuel supply line.

Why won’t my car start but the radio and lights work?

The most common causes of no-start conditions are the battery, starter, battery cable, ignition switch, or the fuel pump. Any of these can be intermittent issues, which will not always act up. Given that you have had success with shaking the battery cables, this may indicate that one of the cables is failing.

Can you jump a car with a bad alternator?

While jumpstarting a vehicle with a bad alternator may technically be possible, do not leave jumper cables connected between vehicles longer than necessary as it can result in damage to sensitive electronics.

How do you diagnose a bad alternator?

If the headlights flicker, dim or get brighter when the accelerator is pressed down, your alternator may be bad. No change in headlight brightness indicates that your alternator is likely fine. A battery test is easy to perform and can be done at home. First, open the hood and start the car.

What are the symptoms of a bad alternator?

6 Symptoms of a Failing AlternatorThe indicator light. … Headlights are dim or flickering. … Other electrical failures. … Strange noises. … Car stalls or has difficulty starting. … Battery dies.

How do I check my car alternator?

How to Test a Car AlternatorStep 1: Open your hood and so you have clear access to the car battery. Locate your alternator and check to be sure the alternator belt isn’t loose.Step 2: Turn your multi-meter to the 20 V setting.Step 3: Start the engine. … Step 4: There are two ways to test the voltage coming from the alternator.Jan 16, 2010

How do you start a car that won’t turn over?

Here are some things to try if your car won’t turn over.What To Do If Your Car Won’t Start: … Try: Cycling the Key. … Try: Tapping on the battery Terminals. … Try: Smacking the starter. … Try: Shifting the Shifter. … Try: Swapping Relays. … Try: Smacking the Fuel Tank. … Try: Un-flooding a flooded engine.More items…