What is this indicator supposed to do? It appears that it is intact (two fat yellow wires going to something inside of a hole in the dash). The owners manual says hold the key to the CCW for thirty seconds, someone told me there is supposed to be a red glow indicator lighting up in that hole in the dash. I don't see anything, is that true? is there a way to check it to make sure it is working. I dont want to burn out my glow plugs trying. New owner here, obviously.