first ,yes the TC control light will flash at WOT with the TC turned off. second if the IC pump is not working , your SC will not in gauge, even though you can drive the car that way U just have no power. email Rob at Needwings for a new pump and you are good to go. one way to test the pump is when the car is cold the SC IC pump works great, then after 2 to 4 WOT jaunts, it has no power ,,,let it idle or shut it off for 5 min. then it works again,,,it is the pump! jim