Mar 14, 2015The Wolf came up with this basic wiring diagram as he was putting this bike together from the frame up. I thought it was the coolest thing I had ever seen s.. Related searches for 1977 harley sportster wiring diagram ironhead sportster wiring diagramsimple harley wiring diagram1979 harley sportster wiring diagramharley wiring diagram freeharley wiring schematicsironhead engine diagramharley starter wiring diagram1989 softail wiring diagram