[chrisinmd]

You brought up a good point when you mentioned the resistance between your electrical system and the frame. On the inspection checklist it specifically mentions that the resistance should be greater than 100k ohms. This is a good guideline to be sure that you have no possible shorts across the frame.

<R55>
No exposed electrical conductors and no electrical contact with robot metal chassis. No chassis parts used to carry electrical currents. Using an ohmmeter, confirm that the resistance between the chassis and each battery terminal is “large” (greater than 100k Ohms).

Good luck in fixing this problem.
-Chris