Im installing a Blitz Turbo TImer on my friends STI and after we got the harness in from summit racing we went to work. After everything is plugged in grounded right and keyless entry green/black wire cut, the timer works fine and the doors lock with the timer working.
NOW THE PROBLEM.... The ABS warning light is on, Speedometer dont work along with the odometer... WTF!!!!
This is the exact install process I did on my 2005 WRX and I never had these problems!