Ignition Coil Secondary Resistance Check
- Disconnect ignition coil connector and secondary wire from ignition coil. Connect ohmmeter leads to "TACH" and high voltage terminals of ignition coil. Measure resistance, remove ohmmeter leads, and connect disconnected wires.
- If resistance was 7,700-10,500 ohms, coil is okay, measure resistance of ignition coil wire. If wire resistance is greater than 5,000 ohms per inch, replace ignition coil wire and proceed to Ignition Coil Primary Resistance Check. If coil resistance is less than 7,700 or greater than 10,500 ohms, replace ignition coil.