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FJR Motorcycle Forums
Technical & Mechanical Problems
FJR frame not an electrical conductor
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<blockquote data-quote="Constant Mesh" data-source="post: 1322769" data-attributes="member: 615"><p>For the analog sensors which use a regulated 5 volt DC supply they need a separate return back to the computer module. You could easily have a separate return system for those devices. These are very low current analog devices. But for most devices where precise voltage levels aren't very critical and (lighting, etc.) a return through the frame would seem reasonable.</p><p></p><p>The wiring diagrams provided in the service manuals don't provide all that much info. I would call them schematics and not wiring diagrams. There is almost no info provided about the negative return bus. All those daisy-chain mechanical splices are completely absent from the drawings.</p><p></p><p>It would be nice to know the routing of the large DC conductors from the rectifier/regulator (R/R). How is the R/R interconnected into the system? Where are the large DC conductors?</p><p></p><p>I don't know if the frame is made from the same material as the crankcase but obviously the large copper cable with terminal is bolted to the crankcase for the operation of the starter, etc.</p></blockquote><p></p>
[QUOTE="Constant Mesh, post: 1322769, member: 615"] For the analog sensors which use a regulated 5 volt DC supply they need a separate return back to the computer module. You could easily have a separate return system for those devices. These are very low current analog devices. But for most devices where precise voltage levels aren't very critical and (lighting, etc.) a return through the frame would seem reasonable. The wiring diagrams provided in the service manuals don't provide all that much info. I would call them schematics and not wiring diagrams. There is almost no info provided about the negative return bus. All those daisy-chain mechanical splices are completely absent from the drawings. It would be nice to know the routing of the large DC conductors from the rectifier/regulator (R/R). How is the R/R interconnected into the system? Where are the large DC conductors? I don't know if the frame is made from the same material as the crankcase but obviously the large copper cable with terminal is bolted to the crankcase for the operation of the starter, etc. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
FJR frame not an electrical conductor
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