Nissan Repair: 1994 nissan sunroof, drainage pipes, drain tubes

Question
My 1994 Nissan PU kingcab sunroof leaks but the seal seems to be in perfect condition.Someone had told me that there was drainage pipes for the front and back on the sunroof and they might be clogged. Is there a drainage system and would this be the problem? Glass is in perfect condition too. Thanks Dave

Answer
David,

There are four drain tubes and if blocked they will cause water to get into the vehicle.  I would check the A pillar at the front and the back where the drain tubes come out the bottom of the truck.  You could use a length of wire to chase the hoses to check for blockage.