Oh, forgot one other possibility worth investigating. There is also the potential for wire shorting. High-vibe/shock environments MAY result in insulation damage to wiring. The result of that damage is of obvious concern.
Once upon a time I had a power distribution module fabricated. During...
FWIW,
Have you checked the wiring? IME, problems like this are often caused by a poor soldering job or an intermittent wire (broken but still contacting while in a low-stress environment) During the ten years I worked for NASA, I experienced enough of these at the hands of sloppy technicians...
