1. Carefully disconnect the high voltage wires by pulling on the rubber boot. Do not bend wires; You can break them from the inside.
2. Check the condition of the high voltage wire terminals. If any terminal is rusty, clean it, and if it is broken or deformed, replace the high voltage wire.
3. Connect ohmmeter probes and measure resistance.
4. If the resistance is greater than 25 kΩ, replace the high voltage wire.