Answer to: Everything turns on car won't start?There is an internal ground in the brain box (ecu) above the battery. Run a ground wire from one of the holes in the corner of ECU to a good ground that is not too long a run of wire. I used 12ga wire with 5/16th eyelets. I used 1/4" x 1" bolt to attach from ECU to the bolt that holds the upper grill in place. It came out about 12" long. You can replace the ECU if you like and just use this as a test.