To test a coil pack, use an ohm meter to check for continuity, ensuring that the ohm values are accurate. Buy a Chilton?s or Haynes manual to determine the appropriate mega ohms reading on the coil pack, or search for th... More »

Diagnose a bad coil pack by using an ohmmeter to compare the vehicle's readings to standard values for the vehicle. Use a scan tool to determine which cylinders are misfiring as a result of the defective ignition coil. W... More »

A coil pack, also referred to as an ignition coil, is a component in the car's engine that changes current generated by the battery into a high-voltage current used by spark plugs. A typical coil pack transforms the 12 v... More »

An Ohm's Law calculator is used to substitute values into an equation that compares voltage to resistance to determine electrical current. On a DC circuit, it is a straightforward ratio, but even with AC, it can be used ... More »

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Diagnose a bad coil pack by using an ohmmeter to compare the vehicle's readings to standard values for the vehicle. Use a scan tool to determine which cylinders are misfiring as a result of the defective ignition coil. W... More »

Test for continuity by using a multitester, sometimes referred to as a multimeter. The ohm setting on a multitester tests continuity, and it determines whether the connection through the device is complete or if it is no... More »

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The eight tools and parts required to properly wire light switches are a single-pole switch, a Phillips-tip screwdriver, a standard slotted-tip screwdriver, a work light, voltage tester, a continuity tester, needle-nose ... More »

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