2003 Lincoln Navigator Traction Control Light/Smell

After having been driving for about 45 minutes I stopped at a store and left the car running while I went inside(my wife was in the car). When I came back out and got in I noticed a funny smell, like electrical burning. When I looked at the dash my traction control light was on and I could not turn it off with the button.

i drove home(about 10 minutes) and the smell was still there and light was still on. I shut off the car and popped the hood. I could smell that smell in there as well but could not see anything. I started the car again and this time it allowed me to turn off the traction control. But I am still worried about the smell. I have not driven the car since(2 days). What should I check and how, in order to be sure I can drive without something catching fire?

Thanks in advance, Marvin