2001 Isuzu trooper, have a blinker (light) problem?

Started car this am, Right indicator light stayed on for my right signal, when i flipped right signal on it did not flash. While driving, the Left indicator came on and off. So I turned on my flashers, they all worked. I turned my flashers off, stopped the car, put on my indicators to the right then left, they flashed but also my dash board lights. I did notice on thing the right tail light remains on when I have the parking lights on and switch is off. What needs to be checked or replaced. All bulbs are working.