My students at the high school I teach at , have redesigned and repurposed a 2002 gem e85 two seater. We are at the final stages and ran into a snag. We have brand new batteries, DeKa gels. When the master switch is turned on our BDI lights up and then goes blank. If you turn on the key it still stays blank, and everything electrical works. We just don’t get the CLUNK, that associates with any kind of movement. Any help would be greatly appreciated, trying to help the kids meet their target date. Playoff football game on Saturday, where the kids would show it off.