Electric Vehicle Forums - Little help diagnosing a discharge debacle.

So after years away from Honda Hybrids (have had two to 1st gen insights and one other hch1) I finally picked up an 04 HCH1 M/T with 100k miles that's been sitting for 4 years earlier this week. It has known battery issues so I ended up finding a local guy selling 1 complete battery assembly and a complete pack with a first gen Hybrid automotive charger/discharger system and pack rebuild instructions with the superbrain.
I have a few things to do to the car since it's been sitting (brake & clutch fluid, coolant, oil, plugs, filters, drain and fill the tank, etc) so I decided to throw the grid charger on the car with the 12v battery removed and see if I could bring it back to life. Install went rather well and everything worked.

I let it charge for 30ish hours until it leveled out at 181v. This morning I went ahead and swapped over to the discharge. I am using a 65w bulb on a single base with a harbor freight voltmeter. I noticed some of the lead wires where getting brittle so I made sure not to move them to much. I let it glow all day and when I went to check the voltage it fluctuated between nothingb and 170's then stop at no readinf. If I would twist the leads it would just keep bouncing voltages.
I made the stupid decision to swap the leads to the 10 amp fused heard a pop and everything went out. I am getting no power at the socket, at the connector, or at the battery lugs. I was prodding around and ended up finding 2 connections that gave me 140 ish stable volts but it got dark and I figured playing with 140v with a flashlight was unwise. The car has not had the 12v battery connected during the whole process so hoping I didnt damage any of the computers. I have not tried hooking the grid charger back up yet either until I sort the issue.

I am thinking I have blown the 100 amp littlefuse fuse... and will go poking around again tomorrow but any advice or suggestions would be helpful.