67-72 Electric speedo

[Steve Cole]

Question for Eric, (or anyone else who knows) - when I push down the reset knob for the trip meter, the locking bar pulls away from the numbers but they do not roll back to zero. I can manually turn them to zero while holding down the rest knob but they don't spin on their own. Is this broken or does the cluster need to have power applied for this to work? I wouldn't think that is the case, but I see no reason for this not working.

Thanks!