Ford Think Traveler

I have a 2001 Ford Think Traveler folding ebike that is not working. I have replaced the batteries with new ones, the self-diagnostics all check out fine (throttle operation, brake interrupt operation, torque sensor operation, speed sensor operation). The problem is that when I turn the key on and then the handlebar mounted switch, the five LED's on the energy indicator panel just blink and the motor doesn't work when I start pedaling. Anyone out there have any experience with this??
Chuck