Aha, the millionth thread in the past two months on sunroof drain problems. As a long time contributor to these threads, I am deeply hurt that my name has not come up yet as an esteemed source of wisdom. I spent a little while this weekend fiddling with this problem since currently both my ds and ps floor pans and carpets are wet.. After various experiments I can report as follows:
1. Both the d-s and p-s front drains are in the panels forward of the door. Pull the kick panel, pull the harnesses out of the access hole near the floor and reach forward inside. The drain hose is 1 inch black plastic and it hangs vertically just forward of the access hole against the inner panel wall. Neither of mine are crimped in the 4-5 inches or so I can reach (Tenn, props that you managed to get a hose clamp around the d-s hose in there – you are a left handed miracle worker).
2. Short of dropping the headliner or removing the dash, it looks impossible to access any other part of the drain hoses.
3. What do the hoses drain into? Good question. Does anyone have one of those fibreoptic cameras that doctors use to film your insides? The p-s hose feels quite loose and I think it just hangs loose and drains into the rocker, maybe through a hole in the floor pan. I suspect that the d-s feels more fixed in place because there are more harnesses and wires to hold it in place?
4. My front sunroof drains do work. The water comes out of the rocker panel drains. If I pull the front rubber plug in the rockers they both drain profusely at roughly the same rate.
5. Unfortunately, the front drains don’t work well enough. If I park facing downhill then 6 ounces of water poured steadily into the sunroof gutters at one time without overflowing the gutter results in some water pouring through the headliner at the A pillar on both sides. Either the hoses are loose inside somewhere or water is getting over the sunroof seal.
7. I am much more suspicious of the sunroof tub seal. When water pools in the sunroof gutters it could clear the tub lip if the seal is loose. My seal looks loose in several spots.
8. When I park normally I am on a gentle uphill slope. In this position the sunroof gutters seem to hold a lot of water before they drain out the back drains. Almost as soon as I pull away in the morning I have to go down a steep hill. I think this causes the pooled water in the sunroof gutters to rush to the front drains. This is where I think the problem lies for me.
9. Using wires to check or clear the drains requires a wire gauge I don’t own. I tried everything from 10 to 18 and can’t get past the top of the A pillar on either side. Maybe I am partly blocked after all. I am going to try some compressed air.
, I know that you are on the 'wet' coast and must be a real expert - but I figured you were busy fixing you CV 
