Domain: technology (Hardware Troubleshooting and Maintenance)
Problem: Image 1 is a photo of the circuit board of a toy car.
Image 2 is a supplementary photo taken from the right-side perspective of Image 1.
Image 3 is a circuit reference diagram.
The current circuit wiring has ensured that the motor’s speed and direction are both controllable. Later, after several test runs by a classmate (without changing the structure shown in the images), the rotation direction of the right wheel suddenly became uncontrollable (it keeps rotating forward), while all other functions remain normal. It is known that this problem is caused by a broken wire.
Which color is the broken wire, and how many wires could possibly be broken?
Answer: the yellow line, two lines