First of all make sure you have the EVO programmed correctly from your computer. Make sure C1and D1 are clicked and saved. At 20 pin plug connect yellow/black and purple to yellow from T harness. Connect light blue to light blue and light blue/black to light blue/black. Connect can hi and low as shown in instruction sheet. Important!!!! Make sure all connections are securely made or you will be extremely frustrated because it’s not working. Program your keys as shown in video but hold even pressure on the keys while in the ignition. If your key is a bit worn it may have trouble connecting to EVO. When the blue lights flash rapidly for the last time quickly shut off ignition while they are flashing. I found that timing is everything on this thing. Good luck! It’s not as easy as it’s advertised!