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Ignition Coil Output Voltage versus a Weak BatteryYes, an ignition coil is nothing more than a dedicated, specialized transformer. As such, the lower the voltage in the primary winding, then the lower the voltage induced in the secondary [output] winding.
This intriguing subject brought forth an incredible search of the internet. It turns out the ignition coil transforms voltage from a battery in order to create an electric spark in the spark plugs which leads to the ignition of fuel.
The ignition coil on a car ranges between 3 and 5 amps, which it gets from a 12 volt battery. The battery produces DC current though the coil The coil can transform the low voltage of the batter to thousands of volts that are needed to start the car.
within one volt above or under battery voltage
Temperature can cause damage to the ignition coil. Temperature which is above 150 degrees Celsius can cause a great damage to it.
When you take a voltage reading at the coil with ignition on and the ignition points are open you would get the same reading on both + and - .
An ignition coil (also called a spark coil) is an induction coil in a automobile's ignition system which transforms a storage battery's 12 volts to the thousands of volts needed to spark the spark plugs.This specific form of the autotransformer, together with the contact breaker, converts low voltage from a battery into the high voltage required by spark plugs in an internal combustion.source is from http://www.madabout-kitcars.com/kitcar/kb.php?aid=269
Battery, kickstarter, ignition, ignition coil,
The spark plug requires a very high voltage for the spark to leap the gap between the contacts and provide a source of ignition. The coil does this by changing the voltage from the battery/alternator from a very low voltage to a very high one through a process called induction.
Battery, kickstarter, ignition, ignition coil,
When you start your car, the starter is drawing the battery voltage available to the rest of the car down a few volts. This reduced voltage would make a could that requires full battery voltage weak and unable to provide enough spark to start the engine under some conditions. So what is done is that while the starter is being run, the full (but reduced) voltage is provided to the ignition coil. When you let go of the key after starting the engine the coil then receives a reduced voltage through a ballast resistor or wire, which is great for a coil that is designed to operate on a reduced voltage rather than a full voltage coil. If this is your problem, you would want to check this ballast resistor circuit, which could be anywhere from the ignition switch, the ballast itself, or a connection in between.
Unplugging the coil wire and not grounding it, yes that can damage the coil.