This is what happens when you replace a 55w bulb with a 100w bulb on an 2002 1150 GSA. Your headlight wiring melts down because the circuit is not protected. Anyway I traced it back to the main harness and looks like it continued to melt inside the main harness.

I am assuming I have to replace the main harness so I picked up a wiring harness for a 2001 GS of eBay for $115 and the part numbers match with the 2002 GSA. FYI dealer cost is $1500+.

Looking for any advice or tips before I jump into this project.

P.S. no I did not mean to put a 100w bulb in I should have grabbed my reading glasses before I installed the bulb. Getting old sucks