You tested the cable and you wrote that the cable is intact. As a rule, in cases where the cable is short-circuited, there may be a malfunction of the electronic card in the control, for your information. I'll still try to answer the question I asked. The short circuit protections on the card you sent your picture to are not made with a diode, but with the smd transistors I marked. Although the fact that they are three-legged does not necessarily mean that they will be transistors, they can also be three-legged smd diodes. You need to check their strength with a measuring instrument. According to the version and year of the controller, there may be changes in the design of the electronic card, but the basic logic remains the same. All of the smd's that you see on the card in this way and that carry the same code are usually put in for short circuit protection. There is even protection for the on-off or Emergency stop or Shift buttons that remain pressed.
Many thanks for your comments. I will go through these to see if I can find any inconsistencies.
best