anyone out there have any input ?
Trace the wires from battery back to the lights... sounds like a ground someplace.
You don't say when they blow, or if you've done any mods... so assuming a stock configuration, you may have a chaffed wire someplace.
fuse blows with a 10 amp as soon as you turn key, used a 15 amp didn't blow no mods stock put 10 amp back in didn't blow yet??????? ran down the road still held up?
Check under the seat really good. Still sounds like a short to ground... to me anyway.