Problem on my motorcycle.

I have been blowing fuses on the circuit for the Taillight/turn signals/dash lights on the Ducati. I have since narrowed it down to the left handlebar control. This control has the turn signal switch/high low beams/passing light(high beam blinker)/horn.

If I unplug the entire harness for the control, the fuse does not blow. I tried splicing each wire so I can plug/unplug each wire one by one to see which one is bad. This didn't work. Even if all the wires are disconnected as soon as I plug the harness in (cut wires at the other end) it will blow the fuse. Is the connector bad? I am stumped.

__________________
'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R