The precharge relay in the USE vehicles is not durable enough to keep charging the capacitors from zero volts to 312vdc nominal, then taking them back down to zero volts. This precharge board is from a 65kw USE system. The goal is to duplicate the circuit and install it in both trucks as is it not available anywhere on the planet. This could seriously increase the precharge circuit reliability. I noticed years ago that there are a couple of tapped holes on the floor of the Dolphin. I wonder if holes 5 and 6 on this board match that hole pattern on the floor of the Dolphin?

Precharge board.

Precharge board.