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Mufp 0505 Ign 8 Z

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(above & right) On top of the coil, you will see a + and a - sign. The + (positive) sign is power from your ignition switch. This is how the coil (transformer) gets its power. The - (negative) sign is the ground to your distributor's ignition points or electronic module.
Ignition System Basics

 (above & right) On top of the coil, you will see a + and a - sign. The + (positive) sign is power from your ignition switch. This is how the coil (transformer) gets its power. The - (negative) sign is the ground to your distributor's ignition points or electronic module.  View Related Article

 

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