How Do You Test A Spark Plug Wire On A Car?
Whether you just want to be sure that the new carbon spark plug wires you purchased are up to par and that the resistance is correct or whether you want to test your current wires for resistance, you can perform a simple test to do so. Proper resistance in a spark plug wire is critical to providing optimum current so your car engine runs at its maximum ability, saving you fuel. Remove only one wire at a time. If it is a used wire, start by wiping down the wire with WD-40, since your visual inspection will be easier with a clean wire. Be sure the metal clips within the boots at each end of the wire are clean, corrosion free and in good condition. Prepare your tester and set up on the OHM test section on the meter at 20,000, or 20k. Measure the length of the wire, since the length is a factor you must know to determine test results. To test, hold the positive, or red, probe into one end, being sure to have contact with the metal clip in the boot and the negative, or black, probe into the
