Toyota Repair: 2003 Highlander water leak, sunroof drain, drain tube

Question
We have a sun-roof. Only during heavy rain, while driving, will water leak on the top, right side only. Will drip through the upper moulding, once down to the floor even, and also notice the rear seat belt wet. All on the right side. It's got to either be the sun roof or the windshield.

Answer
The sunroof drain tube on that side has either come off or it's clogged, to check the headliner needs to be dropped down enough on that side to check to see if the tube is still connected to the roof drain pipe, the sunvisor and both the pillar cover next to the windshield and the center need to be removed as well as any handles mounted to the roof. To check if it's clogged pout water slowly into the drip rail with the glass all the way back, the drain hole is at the front corner, the water is either not going to go down which will cause it to back up or it will leak inside near the windshield if the drain tube is off.