Pico-Secondary-ignition-pickup-PP178-Pico-PP178-Due-to-the-high-voltages-involved-in-secondary-ignition-systems-it-is-not-possible-to-make-measurements-by-direct-connection-attempting-to-make-a-direct-connection-will-almost-certainly-damage-the-measuring-instrument-br-br-The-PP178-is-a-capacitive-pickup-which-simply-connects-around-the-insulation-of-an-ignition-circuit-component-such-as-a-plug-wire-This-avoids-the-need-for-direct-connection-br-br-The-PP178-comes-with-a-shiel