I drove my car to IFO in NH on the 30th. About a 2 hour drive each way. Drove the car an hour each way to go out to eat in Connecticut a few days later. The following day drove a half hour each way. Again, zero issue. I went to move the car and it wouldn’t start. Ok, no problem, the signal wire must of came loose from the starter. That was fine. The starter is new. I checked it with jumper cables and a fresh battery with it out of the car. Checked all of my grounds. Pulled my s300 for a known working ecu. Why do I have no power to the ecu after the car had been functioning perfectly? I’m stumped. Any help? All of the fuses are good as well.

 

If it has a manual transmission, check the little plastic plug that pushes the clutch interlock switch.

 

i have the clutch interlock switch bypassed to rule that out as an option.

 

Main relay possibly?