GE Front Load Washer Wont tumble or spin...

I have a few quick questions… My GE washer (WBVH6240FWW) stopped spinning or tumbling the other day. It will move back and forth a little and even start to spin slowly but will stop after about 15 seconds. I ran the service tests t10, t11, and t14 and nothing. I checked the motor resistance and got the required 6 ohms over the combinations of the three terminals. When I test the red and blue wires to the inverter I get 120V at first but after about the 15 seconds it drops and stays at about 16V and does not come back up to 120V when the motor is supposed to be turning. According to some other posts that should tell me the control assembly needs to be replaced, right? Is there another way to test either the inverter or the control assembly to make sure because I cannot afford to buy both if I change the wrong one first. Any help would be appreciated. Thanks.:confused: