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test for power before the coil, if you have power change the coil, if not trace the wires back and check for broken parts or bad connections.

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Q: How do you troubleshoot the wiring for an ignition coil I have a 1988 jeep comanchee with a 6 cyl. engine Cranked and ran fine one day wouldn't start the next Am getting no spark from ignition coil?
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