[Al Skierkiewicz]

Audie,
This is not a classic demonstration of battery voltage brownout but it may be complicated by a frame short somewhere. When you are listing your battery voltage are you telling us the dashboard reading or are you measuring the battery directly? I would check all wiring first, starting with the power to the DSC and the multi-conductor between DSC and cRio. The rapid on/off that appears in the video is likely caused by a circuit breaker rapidly resetting. That is usually caused by a short or a partial or intermittent short. Coupled with a rapid battery discharge, a pinched cable (power to the DSC) is the likely culprit. If you have any servos, check for a pinch in those PWM cables since they are fed from the DSC. If it is a short, then something is getting warm. Carefully feel around all wiring for some thing is hotter than the others.