Reply to thread

Message: <blockquote data-quote="jarance" data-source="post: 54717" data-attributes="member: 21">An ohm meter just tell you the resistance of the cable from end to end. Of course the lower the resistance, the less power is lost thru the cable. But for HT cable, it is more important, the insulation resistance. In this case, you need an megger ohm meter which can inject DC voltage from 250 to 1000V. There are some megger that can inject the DC voltage at 5000V.To summarised, low reistance is milli or micro ohms. High insulation is meg or giga ohm.I have learn one simple way to test the condition of the cable without any special tool. Just use a long screw driver with an insulated handle. Place any of the expose part of the screw driver by touching one the HT cable at a time. Bring the end of the tip of the screw driver to any body part of the car. Observe whether there are tiny sparks. If there are sign of spark, then the insulation of the HT cable is breaking down and need to be replaced soon.</blockquote>