Webmay 12, 2010 · reversing the polarity on the primary side changes whether the spark will jump from the shell electrode to the center post tip or from the center post tip to the shell. Webjul 9, 2023 · harley davidson offers wiring diagrams for various components, such as the engine, transmission, brake lights, brake wires, black wires, circuit wires, green wires,. Webwiring and circuit diagrams. The diagrams either show entire systems or specific circuits. The circuit specific diagrams only show the components and wiring in the system. Webharness part numbers may be included on some wiring diagrams. Use these numbers for reference purposes only. Always refer to the parts catalog when. Webmar 28, 2024 · if you want to bench test a coil, remove wires, attach a hot 12 volt to the battery (batt, +, etc. ) terminal. Then attach a wire to the ignition (ign) terminal and touch.