The core of the high–tension lead is typically made of carbon-impregnated linen or fiberglass Figure 47-13. It has a specific resistance, or opposition, to current flow that helps reduce the radio frequency interference emitted from the high–tension leads.
Herein, what are HT leads made from?
High Tension (HT) leads consist of a single conductor covered in an insulation layer several times thicker than the conductor. This thick insulation layer – PVC, EDPM or silicone or a combination of them – is necessary to prevent arcing through the insulator to an earthed part of the engine.
Likewise, how do you test for high tension leads? To check the secondary winding, take off the distributor cap and detach the central HT lead (See Inspecting the ignition system ). Remove or push back the cap from the end of the HT lead to expose the core connection. Remove a lead from one of the sparkplugs, then switch on the ignition.
Likewise, what is inside a spark plug wire?
The heart of it all is the core. Typically the conductor core in plug wires have been carbon impregnated fibers, everything from nylon to kevlar type fibers have been used, to help transfer moveable electrical charges from the distributor to the spark plug. For very high performance vehicles, a solid core wire is used.
How do ignition leads work?
Ignition leads, also known as Ignition wires, High tension leads, High tension cables or Spark plug leads are the cables that connect a distributor, ignition coil, coil pack, or magneto to each of the spark plugs in some types of petrol combustion engines, to ignite the fuel-air mixture in the cylinders.