Cavalier machine

I have recently purchased a 7UP machine, manufactured by Cavalier Corp. model#208 44561 or 2C8 4445G1 / serial no. 425835. The refrigeration works and the machine will vend if I hit the micro switches on the motor inside.
The machine does make change. Something is not connecting between the selection buttons and the motor. I have a strong Electro-mechanical background, but don’t have any repair manuals. I don’t even know what questions to ask. Help! Chris.

[dr galaga]

I'm not sure about the model of your machine.  Can you post a picture, or do you see your model in the soda machine section http://soda-machines.com/machines/cav/index.html ?