Only the J4 engine is overheating

Hi, I have encountered this problem before, the motor driver may getting more power input than its capacity, try checking the DIP switch setting of the J4 driver to see whether the set up is correct, you can look it up in the manual

I rechecked my J4 driver and fixed my DIP switch set up, but then I still get overheat, I then rechecked my wiring system and realized I mismatched J4 with J5 cable in the electrical box, I then switched them back and solved the overheat problem. So jjuat recheck everything and make sure the wire connection run appropriate amount of power to the right motor driver

You probably wired connections incorrect. You might have connected the cables cross. Check that J5 cables go to correct driver.

I rechecked the j4 engine connections. But again there is overheating. You had the same problem. How did you find the solution? Thanks.