AutoZone Product & HowTo Info | W | Ballast Resistor

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    Ballast Resistor

    Ballast Resistor Operation:

    A resistance element in series with the primary circuit to reduce the voltage supplied to the coil during engine operation.

    How To Instructions:

    Inspect - Check for obvious problems.
    Test - Give it an in-depth diagnosis.
    Replace - Out with the old, in with the new.

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