I am working on a 1990 Monaco Crown Royale with a cummins Hello I am working on a 1990 Monaco Crown Royale with a cummins engine. The problem that I am having is that the engine won't crank to start. I can't find any wiring diagrams for this RV to check my voltage and ground connections. If I knew where I should have power, ground and when (key on, cranking etc.) it wouldn't be hard at all to figure out. Honda Motorcycle Wiring Diagrams Honda CBR400 RR CBR 400 J K Electrical Wiring Harness Diagram Schematic 1989 1990 HERE. Honda CBR400 RR CBR 400 L N Electrical Wiring Harness Diagram Schematic 1990 - 1993 HERE. Honda CBR600 F CBR 600 Electrical Wiring Harness Diagram Schematic 1987 - 1990 HERE. Honda CBR600 F2 CBR 600 Electrical Wiring Harness Diagram Schematic 1991 - 1994 HERE 1990 Sportster Wiring Diagram - Wiring Diagram Schema 2004 harley sportster 1200 wiring diagram. I need it now. 1990 Harley Wiring Diagram Wiring Diagram Database Wiring diagram for a harley 1990 1340 heritage softail i have a custom chassis my brother started to build harley davidson xl 1200 s sportster sport question.