First try flushing them out with water. You'll probably have to prop the hoses open to do this; I recommend using 1-inch lengths of soda straw.
1) Open the sunroof and front doors, then for each door:
2) Use your fingers to pinch the ends of a hose open (it'll be exposed near the door hinge - little flat black rubber thing).
3) Push the soda straw piece in about halfway, so it sticks out enough that you can retrieve it if you want to. This may trigger a small flood of dirty water.
4) Pour filtered or softened water SLOWLY into the sunroof's gutter on the appropriate side. You should wash the hose clean, and eventually the water coming out through the soda straw will be clear.
5) Take out the pieces of soda straw (or leave them in if you want to; it makes it easier for the gutters to drain in the future. If the hose still won't drain despite your flushing, use a piece of soft, semi-rigid cord to clean it out. For mine, I took an old computer mouse I'd already replaced, cut off the connector, and pushed it through the hose little by little to get the mud out. Good luck!
Use a air compressor and blow the lines out. This almost always works.
In many instances , drain plugs for sunroofs are located inside the door panel. In some models, this can be found on the passenger side compartment. This is due to the sunroof having two drain hoses, the other being on the drivers side. Once you open the vehicle doors, you should be able to find it. The upper portion of the hoses will be visible if the headliner of the vehicle is removed.
Remove the celling apolstry and going down the right and left front windshield supports are a set of clear drainage hoses for the sunroof.
Most sunroof leaks are caused by clogged sunroof drains. Sometimes you can clean the debris from the channel around the frame and rinse with a hose and check that the water is draining below the car. I'm sorry to say most of the time requires accessing the hoses that connect the sunroof frame/channel to the body of the car. This requires loosening and dropping the headliner. To do this the sun visors, A/B/C pillar interior trim, door/car body gaskets. Once the headlight is loose/dropped you would need to disconnect the hoses from the sunroof cassette and blow the hoses clean with compressed air. I normally check/flush the lines with water. Reconnect the hoses and reassemble the interior.
you can find them in the trunk on the left and right sides. take off the fabric coverings of the trunk an you will be able to see clear plastic hoses/tubes around the fenders.you can pull them out of the bottom fittings and blow air into them to clean from debris.it worked for me
This sunroof has a drain at all 4 corners, 2 pointed forward, 2 pointed rearward. The front drains have hoses attached that run down the windshield pillars and out into the fender/cowl area on each side. The rear two have hoses that run all the way back to the rear door pillars then down & out.
How do you replace the trunk drain hoses on a 1965 thunderbird.
I have a 96 Saturn SC2, and the seals have gone out, I use a floor mat to cover mine. But.. when you get the chance, try to take the headliner out and check the hoses. There should be drain lines. Make sure they aren't clogged. Oh, also.. check the fuses and what not to see if that is why it isn't working.
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The diesel fuel will ruin the rubber parts like the hoses and seals over time. I would drain and flush the entire system (engine block, radiator, hoses) and refill with 50% antifreeze and 50% clean water.
Take off the hoses!
Fill hoses for washing machines catch the materials that can clog a drain. An example is lint.