Well, I have finally had a problem with the old Bus. I have a "check engine" light. After some digging and attemps to discover what the problem is that was causing the light I disconnected the battery and reset the sensor.
During my search for answers I found a switch under the dash that is labeled "Diagnostics".
Does anyone know what it does?
Does anyone know how to use it?
Will you share with me the information so I will not go nuts trying to figure it out?