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Home >> Cadillac >> 1991 >> Seville STS >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Basic Testing >> Basic Ignition System Checks (C4) >> IDI >> Ignition Coil Resistance

Ignition Coil Resistance

Disconnect leads from ignition coil. Using an ohmmeter, check ignition coil secondary resistance. Secondary resistance should be less than 10,000 ohms on all models.