2005 Toyota Sienna, 160XV

oh, okay then lets start over. It can not be the problem i just said. It has to be the starter kill. a couple of things......first, you have to make sure that the system is unlocked/disarmed in order to start the car. 2nd what is the org wire (smaller gauge one) going to? it should go to nothing. last how do you have the green and purple wires hooked up to? purple starter side green key side? i bet you just have to unlock first then try and start with keyCruisin Security And Sounds

The ornage wire I have going to ground is marked "ground when armed output."

ingo....unhook and start car with key. That wire is for additional things - window module, etc.Cruisin Security And Sounds

What does ground when armed really mean?  I wire airplanes for a living but I am new to car wireing, its very different.

it just means that the wire will put otu a ground when you arm the alarm. So when you press lock on the transmitter it will throw out a ground. What you did was throw ground to that wire which tricked the alarm to think it was locked, engaging the starter kill and preventing the car to startCruisin Security And Sounds

cool, In the morning I will go cut that wire and see what happens, thank you so much for your help.