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Ignition Coil Resistance (Spectrum)
- Remove distributor cap and rotor. Remove primary leads from ignition coil. Using ohmmeter, check resistance between primary terminals of coil. See Fig 1
.
- Check secondary resistance between coil secondary terminal and primary positive terminal. Replace coil if readings are not within specifications. See IGNITION COIL RESISTANCE table.
Courtesy of GENERAL MOTORS CORP.