Next remove one of the spark plugs wires from the plug itself.
Step up ignition coil.
Slide the plug into its port on the new ignition coil until you hear the release click.
If you don t hear a click it means the connector isn t pushed in far enough and the coil may not function.
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Test the primary winding.
Because this is a step up transformer the secondary coil has far more turns of wire than the primary coil which is wrapped around the secondary.
Find the ignition coils.
The greater the turns ratio the greater the voltage step up.
Turn the vehicle off and open the hood.
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Connect the plug into the side of the ignition coil.
An ignition coil is technically a step up transformer capable of making a low voltage input to a high voltage output that leads to generate a spark between the spark gap to burn the air fuel mixture.
This 250 volt spike feeds the primary coil that then induces a corresponding voltage in the secondary coil.
Performing an ignition coil spark test 1.
Open the hood and disconnect the negative.
The ignition coil is a step up transformer that converts the vehicle s low voltage battery power 6v or 12v to high voltage somewhere in the neighborhood of 24 000 volts.
Like other transformers it consists in part of two coils of wire as shown in the diagram at right.
How to test ignition coils safety first.
Disconnect the mounting bolts.
As with most types of vehicular maintenance you ll want to begin the test.
Remove one spark plug wire from its plug.
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By winding more turns of wire on the secondary coil than on the primary coil a voltage.
Remove the spark plug using.
These are both wrapped around the same iron core.
Remove the ignition coils.
A 100 1 turns ratio typical of many coils on the market means there are 100 secondary turn windings to every one primary turn.
This high voltage is capable of reliably arcing across the gap on a spark plug to ignite the fuel air mixture in a cylinder.
Let your vehicle cool down and put on the emergency brake.