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Does your car have a sun (or moon) roof? A leak in a sunroof will sometimes follow the roof over to the door post and down to the floor were the water will accumulate. This can be hard to find sometimes but having one person spraying water on the roof while a second one checks the inside of the vehicle you may be able to pinpoint the leak.
Hope this helps.
Does your car have a sun (or moon) roof? A leak in a sunroof will sometimes follow the roof over to the door post and down to the floor were the water will accumulate. This can be hard to find sometimes but having one person spraying water on the roof while a second one checks the inside of the vehicle you may be able to pinpoint the leak. Hope this helps.
Does the vehicle have a sun/moon roof? If so, it is common for the drain tube to become plugged which causes the water to back up into the sun roof module. The water then spills over into the rails that run side to side and leaks into the passenger compartment. The low point of the roof rails being the interior light. Open the sun roof all of the way and look for the drain tube(s). They usually tap into one or more of the corners of the sun roof module and then follow the conture of the vehicle either to the front or rear and drain the water out near the wheelhouse area. You'll need to find some way to disconnect the tubes from the module and flush the debris out. It is usually tiny bits of dust or sand that will flush out quite easily. You have to watch out for a couple of things. Do not drop the tubes as they may fall into the channel of the vehicle, and, use very light water pressure when flushing. There may be other connections in the hose downstream, and you don't want to dislodge those connections.
If you can access the top side of the tube without removing the moon roof, you can take an air compressor hose with a rubber nozzle, jam the tip in the hose and blast it with quick bursts of air. To insure that you got the blockage out, pour some water in that area and watch around the wheel well for the water to flow out.
I had a similar (and maddening) problem with my 1994 Bonneville SSEI. Try the following!
First,check the roof drains from the moon roof. The drains on the Bonneville from 1992 until 1999 are often and easily plugged. This simple check can be properly accomplished by first opening the moon roof, secondly finding the front drains (usually near the four corners of the moon roof) and third using low pressure compressed air to "gently" clear them. After clearing, you can check proper drainage by the drains by pouring a bottle or two of water directly into the drains and then looking beneath the car for the water that was drained.
Secondly, check the quality of the drain hoses from the moonroof. You can find them by carefully removing the plastic covers on each side of the the inside windshield pillars. Check out the hoses for proper connection and that they remain in good shape. The moon roof drain hoses can sometimes become disconnected or even disintegrate with age to the point that they leak.
Third, check the door seals and make sure that they are properly functioning. This can usually be accomplished by making sure the seals are not torn and ascertaining if the seals are properly secured to the door jams with adhesive. If not, reinforce the adhesive with additional adhesive.