I had the Transmission Fault light while on the downhill run on a mountain pass. I went through some high water while in fourth gear. the indicator came on. I tried all of the reset methods (gas pedal etc.). My car shifted roughly in automatic mode. After a day and a half I read a thread that said to check the #5 fuse. I did, it was fine, and a had it out for about a minute, put it back in, started the car and the light went out.