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Coil Operation Check

  1. Connect a 12-volt test lamp to negative terminal of ignition coil. See Fig 1. Ground test lamp.
    Fig 1: Checking Ignition Coil Operation
    G09323493Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

    Use 12-volt lamp with ignition turned "ON". 

  2. Crank the engine, but do not start it. Test lamp should flicker slightly.
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