Battery Light Issue

[kezay]

I have the 30-1030 unit and ever since I did my K swap into my 2003 civic. The battery light never turns on if I use the EMS only. However when I plug in the jumper harness & stock ECU to the EMS the battery light comes on and stays on and after a while the car will shut off and never start back unless i unplug the jumper harness. If I use a stock EUC everything works fine. Can someplease provide some sort of direction please.   

[Emphysema]

Hey I actually had a Engine light problem my self on the K series I found out later it was a blown fuse my alternator was only pumping enough to charge the battery so check that and see if it helps at all but your problem sounds just different though. 

[de_vteckid]

I have the 30-1030 unit and ever since I did my K swap into my 2003 civic. The battery light never turns on if I use the EMS only. However when I plug in the jumper harness & stock ECU to the EMS the battery light comes on and stays on and after a while the car will shut off and never start back unless i unplug the jumper harness. If I use a stock EUC everything works fine. Can someplease provide some sort of direction please.   

Hey, i have this same problem. I just got my 30-1030 unit and when ever i plug on the jumper harness into the stock ECU the battery light comes on so i just dont use it. Did you find out what the problem is or is it an ECU error?