Short story. Have a 1986 Omni GLH with a 1988 Daytona Shelby Z engine swapped in. Im using 1986 GLH electronics with a 1986 GLHS calibration. I took the 1988 Daytona starter wires off and used the original 1986 starter wire harness. All the wires, except for the AIS and TPS, are conected and run. There's no battery and no LM in the car, we just hooked a battery charger to the hot and negative terminals because I wanted to test the horn. Anyways, when we did that the starter made a buzzing noise. I looked under the car and we did it again and it was not arcing or anything. What could cause this?