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Ignition Coil Test

With ignition off, check secondary resistance between Red wire (pin No. 4) and coil tower. Resistance should be 7000-13, 000 ohms. Check primary resistance between Green wire (pin No. 1) and Blue wire (pin No. 6). Resistance should be 1-2 ohms. If resistance is within limits but the coil is still suspected, test coil on a standard coil tester. If reading differs from the original test, check for a defective harness.