Alright heres a video of my truck. Now here's what I want to find out. If you notice, the voltage is 11.7 while it runs initially, then whatever that something is lets up and shows the grid heater only drawing it to 12.2, then it lets off and 14v is seen. So what is the initial thing that draws it down to 11.7? Does the grid heater have 2 power levels?