I am a beginner attempting to learn how to hack RC cars like is demonstrated in this video.
My problem is I can't spot the ground pin and the other pins related to the wheel drive functions except I randomly test pins with my multimeter.
In an old pair of RC cars, after a long time of trial and error I finally located the ground and one of the pins connected to a wheel.
However, I just wonder if there is a technique for locating ground and other pins in a circuit, please?
I want to learn how to locate the relevant pins so I can hack these cars.