Electrical Foult In 4wd System

[Team swift]

hey guys

I have a 1992 surf with the ever troublesome 2.4 turbodiesel. I picked up a problem with the 4wd system. When driving in the normal 2wd mode, it sometimes makes a clunking sound from the front diff and the 4wd light flickers. when i unplug the 4wd control unit, behind the centre console under the radio unit, all is fine. So as of now, i ride with the unit unplugged and plug it when i need the 4wd! This started shortly after it spent a night submerged in about bumper level of water. Any ideas?

[Andy]

I would say that it is one of the electrical contacts/switches on the front diff or transfer box, worth having a crawl underneath and unplugging any wires and cleaning.