If either reading is off, that means your coils likely aren't working properly. Generally, the secondary resistance should be between 6,000-8,000 ohms. Next, check the secondary resistance by moving the negative probe to the metal piece that connects the coil to the spark plug. Typically, the primary resistance should be somewhere between 0.4-2 ohms. Set the multimeter to 200 ohms in the resistance category and take the reading.

Then, attach the negative probe to the negative terminal. To test the primary resistance on the coil, grab a multimeter and attach the positive probe to the positive terminal on the coil. Remove the cables from each spark plug, then unscrew the first ignition coil carefully and lift it out of the engine block. The ignition coils in your vehicle should be located on the right side of the engine, next to the spark plugs. If you don’t have a diagnostic tool, you can remove the coils to test them instead. On most scanners, a code P0352 indicates that your coils aren’t working correctly.

You can usually test your ignition coils by plugging a diagnostic machine, like an ODB2 scanner, into the port underneath the dashboard and turning it on. The ignition coil in your vehicle sends electricity to the spark plugs, and you might need to test the coil if your vehicle isn’t starting or frequently stalls. Using a spark plug tester also means you won't expose your combustion chamber to debris.Then skip ahead and have your friend crank the engine, watching for sparks in the tester's gap. Instead of attaching the spark plug back to the wire, attach the spark plug tester to the wire. To save time and avoid potentially damaging your spark plug, consider using a spark plug tester instead.Allow the car to sit and cool for an hour to prevent significant injury. A car that has been driven for as little as 15 minutes can heat the engine to around 200 degrees. If your vehicle has been running for a while, its internal components are likely to be very hot.To prevent injury, be very careful when working with your vehicle's electrical system - use gloves and insulated tools at all times. Usually, these wires run from the distributor cap to each of the spark plugs individually. Next, remove one of the spark plugs' wires from the plug itself. Remove one spark plug wire from its plug.

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