How do I fix a joycon that doesn't rumble/vibrate?

I dropped my nintendo switch with the joycons attached, and it landed on the left joycon. The force temporarily dislocated the charging rail on the left joycon, but it could be reinserted and the joycon closed easily. However, after the drop, the joycon no longer produced any vibrations. Is there a way I can open the joycon and check inside to see if something needs to be reattached, that was dislodged when I dropped it? What part of the joycon controls the rumble?