Disarm Alarm for BOA Remote Start

I am installing a BOA Remote Start on a 2000 300M and I need to disarm the alarm using a relay and 680ohm resistor.  My first problem is that I don't know what kind of relay I need.  The next is I don't understand how the relay and resistor get hitched up.  The wire that is supposed to disarm the alarm is (lt. GREEN/ orange).  The wire on the RS harness is (lt. GREEN/ black) and the 12volt constant is (pink/black or red).  I know to disarm the alarm it needs a positive pulse through the resistor but what wires go to what? This is a X-mas present for mom and everything has been a breeze up until now, so any help is greatly appreciated. Rob Gray  

SPDT RelayPin 87 = 680 or 900 Ohm Resistor to cars Lt.GREEN / OrangePin 87a=  Not UsedPin 30 = 12 Volts + (positive)Pin 86 = 12 Volts + (positive)Pin 85 = Lt. GREEN / Black from your RS MO

Don't Learn from Others Mistakes

You Might Be the One That Knows.

Thanks a lot. Happy holidays, Rob Gray