THE ULTIMATE GUIDE HOW TO
The main malfunctions are an open circuit and a leakage of current. An electric circuit breaks at the junction of the metal contact of the wire with the conductive core and other parts of the ignition system.
Main causes of spark plugs wires go bad
1. Current leakage
Current leakage occurs through contaminated wires, plugs, distributor cap and ignition coil, as well as damage to the insulation and wire caps, so their dielectric properties deteriorate during operation.