2003 Mitsubishi Montero dash lights

My indicator lights the ones that shows if you are in 4 weel drive or 2 wheel drive blinks the yellow/orange light in the center while I am drivine after about 20 miles. I had the therm. Replaced and the transmission fluid replaced. This kept the light off for about 1 month when it did this before. It does not seem to be driving any different, just like a car with 100000 miles. Any help will be great. Also if I turn the car off the light will go off for about another 20 miles