[MPaulHolmes]

You can just watch the change in voltage over time. Or use 80% done, or anything you want! That part of the code doesn't exist yet, but would probably take like 30 minutes. A shorted IGBT would have a voltage drop of probably a few volts at the most, so the cap would never fill up. But if the pack voltage feedback is like > 12v (for example), and it isn't changing, then you would basically know it is good. A super paranoid person could also wrap the precharge wire through one of the current sensor windows. If current continues to flow, then the precharge failed.

The precharge resistor resides on the little precharge board. It has room for a 2Ohm to 1000Ohm Ohmite ceramic composition pulsEater (rated for like 5000v or something stupid like that. haha). Or you can just use a cheaper precharge resistor or 2 in parallel (there are 2 holes per resistor leg for the precharge resistor so you can use 2 little ones in parallel if you want). My thinking was, people poking their fingers around in the control section shouldn't have to deal with anything above 24v. That's why I first stepped down the high voltage to like 0-3v, and then run it to the control board.