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Ignition Coil Resistance Test

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, 1995 Dodge Caravan, and 1995 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
  1. To measure coil primary resistance, disconnect electrical connector from coil pack. Measure resistance between B+ terminal and each remaining terminal of same coil connector. Replace coil if resistance is not within specification. See IGNITION COIL RESISTANCE  table. If resistance is within specification, go to next step.
    NOTE: Each coil tower is labeled with corresponding cylinder number.
  2. To measure coil secondary resistance, label and remove all spark plug wires from coil. Measure coil secondary resistance between companion secondary coil tower. See Fig 1 . Replace coil if resistance is not within specification. See IGNITION COIL RESISTANCE  table. If ignition system components are in good condition, ignition system is okay. If vehicle still fails to start, proceed to NO-START TEST.
IGNITION COIL RESISTANCE - Ohms @ 70-80°F (21-27°C)

Application Primary Secondary
3.8L 0.45-0.65 7000-15,800
Fig 1: Checking Ignition Coil Secondary Resistance (3.8L)
G95G27017Courtesy of CHRYSLER CORP.
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