Three bolts on Y, one under reflector, pop panel off. Three clips that hold the cable in place, right in front of you. Is one missing or broken? Replace it with something.

 

Wish it was as simple as that, maybe it cured the problem in your case, but it's most likely issues causing it:

https://www.northamericanmotoring.co...-problems.html

After we discovered the cable piece came out of the plastic holding piece, we did duct tape the loose cable along the interior door panel.