[ultimateirving]

there is no light on the ECU, technically u can do the Diagnostic by turning the little adj screw on the ECU( there are tons of procedures of How-to do this online) that would be the only light to light up. My ecu doesnt have the light so i cant garuntee thats an accurate means of testing if the ecu has power. Best bet is to get a wiring harness pinout for ur ecu and probe test the power wires with a volt meter.