a friend has a 2k runner and everytime he hits the carwash his 4wd light flashes and won't engage. Anyone have a wire diagram of the 4wd system and any thoughts on wores to check would be appreciated. Seems like when it gets wet the problem arrises. When it's dry, everything is cool. Help...

 

Sent a PM. If it is a switch selectible 2X-4X4 it may be the 4WD computer getting wet.. It is behind the left kick panel (by drivers left foot).