One motor of my robot isn't working

For some reason, my LEFT WHEEL MOTOR for my CLAW BOT will not work. It used to not move, but it isn’t even detecting it’s plugged in now. I’ve changed the cord, changed it from plug place 1 to 2 and to others, and even changing the motor completely THREE TIMES. But, it still won’t work. All of my other motors work. What can I do to fix this?

  1. Replace the wire, see if that works.
  2. If replacing the wire doesn’t work, try changing the port. If that fixes it, mark the port that’s not working as it likely broke from ESD.
  3. If 1 and 2 does not work, replace the motor as the motor is likely broken.

Note: If all three options do not work, I will garuntee you it is likely a programming issue and it would be appreciated to post your code :slight_smile:


It might be a good idea to try to isolate the exact source of the problem by testing each component separately just to be sure whether any hardware is actually dead.
Connect the motor to the cable of one of the other working motors. If the motor works(it probably will given your previous testing but its best to be sure) then you know that the motor was not the problem.

Connect one of the working motors via its cable to the left motors brain port. If it works, the only thing left is the left motors cable.


Bear in mind, there are chances where a motor can break a port. So, If all options are not working, I would suggest doing the following:

  1. Turn the robot completely off and unplug the battery
  2. Change the motor, port, and the wire at the same exact time, while the robot is off.
  3. Turn the robot on, and download code with the new port in config
  4. Run code
  5. ???
  6. Profit

if its a custom wire that you crimped then that port may have fried as i have had that problem and it hasnt been solved yet for me
custom wires have a thing for frying your brain im lucky it was only the port


I don’t quite have many motors I could possibly use. But I’ll try this and see if it works.

hello everyone that has responded!

I have found out the problem.

The motor was a problem. Something wasn’t letting the silver bar all the way in, so it wouldn’t turn. I’m trying to get a new motor. Thanks for all your help, though!

You shouldn’t have to buy a new motor to get axles to fit. Is the axle that your trying to insert rough on the end? Try filing down the shaft.


I am having a problem and i need help. My robot would slow down and stop randomly I have changed the battery and it still continued, and the connection is still good please help me asap

Is the motor hot?


If you overheat the motors by running it it will slow and stop. Have you checked the temperatures? Is there any noise that is coming from the motors and are they turning correctly?


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