Grid Heater Bypass Simplified The method described below is a simplified way of turning the grid heaters on and off when starting the engine and reducing the electrical load on the alternator without setting a P0380/P0382 code.   The bypass solenoid is a 300amp rated Ford type starter solenoid.  When both grid heaters are on there is about 180amp draw and after start up the draw is reduced to 90 amps so the bypass relay has a 50% plus overload safety factor.  Suggested