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Ignition Coil Resistance

  1. Remove distributor cap, rotor and dust cover. Using ohmmeter, check resistance between primary terminals of coil. See Figure and Fig 1 .
  2. Check secondary resistance between coil secondary terminal and primary positive terminal. Replace coil if readings are not within specifications. See IGNITION COIL RESISTANCE table.
Fig 1: Checking Ignition Coil Resistance (Prizm)
G121594Courtesy of GENERAL MOTORS CORP.
HIGH TENSION WIRE RESISTANCE

Application Ohms Per Foot
All Models 3000-6500
IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)

Application Primary Secondary
Prizm 1.30-1.60 10,400-14,000