Changed the batt on my 675...now nothing?
 

I ordered a battery mail order and tried to fit it--turns out was the wrong one and didn't fit in the bay. When I replaced it with my old one the bike was just dead. Nothing on the dash, no response from the key. Fuses are all good, I put a multimeter on the fuses and they're all showing current. What the heck could have gone wrong?

Kill switch?

If you have power at the sub-fuses, I would trace power at the ignition switch. If no power there, it has to be a wire from the fuses, a connector, or the ignition switch itself.

When the regulator went on my old Suzuki, the excess voltage melted a soldered-connection in my ignition switch (they were very close together and it arced across).

Can you elaborate? You can only measure current if you remove the fuse and put a multi-meter in-line with the fuse... is that what you did? How much current did you measure?

Or did you measure voltage across the fuse with the fuse in place? In that case, it should have read 0 or close to it (noise).

It was the main fuse, they put a second one for a spare right next to the regular one and I was looking at the wrong one. Haha /doh