Originally Posted by TerminatorX5

i still suspect mechanical issue - could be motor itself...

to completely rule out the issue with the controller, we can try the swap of the pins - send the left signal (known good signal) to the right headlight and right signal to left headlight (known good headlight)...

Do you think you can do this? I will guide you as much as it is possible remotely, but you will be the one doing the work - so, it is your call...