I just found this two rc cars, and I want to give them a new life. The small one seems to be working ok, but the motor of the biggest one doesn't want to work.
I removed the dc motor and noticed one thing I never saw, there are the two wires that connect to the motor pins, and there was a third wire but got loose. I think it was soldered to the motor body, and I wonder where must it be connected.. ground? I try to ground it but the motor still doens't work.