Relays are used to switch large currents with a small current. The photo shows an open relay outside the can. Inside view of relay. Spark Plugs deliver the spark that ignite the fuel-air mixture in the cylinders. The ignitions systems typically produce sparks in the range of 20,000 to 30,000 volts that will arc across the small gap between the center and outer electrodes.
Plugs come in Resistor and non-resistor types.
One of the reasons for resistor type spark plugs is to reduce electrical noise in the system that would cause static on car radios. Return to Tips page Return to AutoTips home page. Classic car parts . If you order from New Whiteland Auto Parts, please let them know you saw their name on the AutoTips page. This page has been accessed times.