Don't know why you would have two. Is the one on the head actually connected to anything?
Most people use the one on the neck if it's there (mine is just a blank boss). The one on the head will give faulty readings.
Do you have an electric fan? If so maybe one is connected to the fan and the other to the dummy light? Maybe gauge and dummy light?
Last edited by gbauer; 12/30/16 10:06 AM.
