Water in Passenger Footwell

[MW3Designs]

I just noticed a good amount of water on the floor mat the other morning. We have been getting tons of rain here in Upstate NY. I washed the truck this AM and noticed water again. I will check the sunroof drains and cowl. What’s the best way to look for the cause, a water hose?

 

[Lgibson]

I could not see the source of the water as it flowed down the large harness from above. This am I will try compressed air through the sunroof drain tube.

 

[Lgibson]

Frankly, I’m now suspicious of a manufacturing defect as our passenger side sunroof drain is way too short, terminating somewhere behind the large fusebox behind the lower glovebox, inside the passenger footwell. I see no alternative but to run a new drain tube, perhaps into the plenum. Will pull it out tomorrow and see what is possible.
Hard to believe we’ve lived with this for 5 years and not noticed it before now. Of course it hasn’t rained this much since 2005.

 

[Lgibson]

Anyone know what this little tube behind the air vent rubber does?

 

[Lgibson]

So, here you see the ruptured passenger-side sunroof drain that was pouring water down our wiring harness. On replacement I avoided removal of the Central Junction Box by using a scope to watch through the drain hole as I pushed the new hose down behind the CJB. After the ****** was in sight I ran a cable down the tube and grabbed the end with pliers, leading the ****** closer so I could pull it through into the air vent. I also used the 12mm Canadian push connector from Amazon to splice old and new tubes, avoiding dropping the headliner.
Let it rain!