heavyduty thanks a ton . i am a mechanic by trade so this is not all that hard i just HATE messing up factory harnesses and thought this kit would make it EASY .. since i already have the FAST 2003 harness can i just cut off the smaller pig tail and use that to connect to the factory harness . it seems that is all that the FAST 9999 kit is . if this is correct it will save me alot of time and shipping back and forth to get what i think i already have on the FAST 2003 harness ..