Ok. After more component level troubleshooting I started following the current flow. The first check after all the voltages on the battery was the main contactor. The resistance was about 120ohm. A bit out of specification. I changed it with the regen contactor and it came to life. When I looked the bad contactor to about 36 volts it drew way too much current. It heated up and when i then checked the resistance it was about 15 ohms.

What it looked like is that the contactor was heating up and then increasing the current it was drawing pulling down the power supply on the login board making the logic board report a very low battery and shutting down. Let it cool down a few minutes and it would work for 20 seconds or so until the coil heated up again and pulled too much current from the logic board shutting it down again. Well I feel good about finding this problem without swapping more parts.