Blown main fuse confusion

[andyvh1959]

This is on a VN900, but it's likely similar for a lot of Kawasaki cruisers. My buddy tried to get his VN900 fired up for the riding season. His 900 has 40,000+ miles on it, all stock engine wise, even the intake/exhaust. He got it fired up back in April, but not since then as they were travelling for all of May.

Last week he tried to start it but no go, tired to jump start it off his Mustang. So he got a new battery, installed it, and nothing, no lights, no fuel pump whine, no speedo sweep. I checked the bike and nothing shows bad although the 30amp main fuse had blown. Installed a new fuse, and, nothing. Meaning nothing like as if there is no battery in the bike. Main fuse is still intact. I wonder if the diodes in the relay box are blown? Checked the new main still good. Must be something between the main fuse and the ignition switch. Perhaps even the ignition switch itself.

So far I've searched the wiring and connections as best I could in his garage and found nothing out of place. Nothing chewed through. Nothing burned/crispy. Nothing corroded. I may pull out the ignition switch and start jumping contacts and see if anything comes to life. But I really suspect jumping the bike from his car resulted in blowing the main fuse, and likely fried the diodes in the relay box, especially the one that controls the ignition.