Radio Schematic for Harley Davidson - The HERD Radio Schematic for Harley Davidson 04-13-2012, 09:09 PM. I am trying to add REAR speakers but been looking all over google and not a good match at all. Anyone have one laying around? I have the 2010 Street Glide.. EDITED this thread with the information Got it and here it is.t get the 35 pin from the dealer. Related searches for harley wiring schematics harley davidson wiring schematicharley sportster wiring schematicharley wiring diagramharley wiring diagram freefree wiring schematicsharley wiring diagrams pdfharley wiring harness diagramharley davidson wiring diagrams free