So I got a Compustar 2w900fm-as and the 556U immobilizer. I haven't started the install but i've taken my seat out and looked at the harnesses and have identified them all. I've done stereo wiring but never an alarm/remote starter. After search this forum and google long and hard, I think I can do this.

I think I have everything straight in my head, except on the CN1 (main) harness that comes with the compustar there are 2 prewired relays, and I have no clue what to do with them. One has Yellow and Yellow/Black wires. The other has Blue and Purple wires.

 

They should be for anti grind and second starter/acc/ign.

 

so I think I'm gonna have someone else do the install. I've done tons of stereos but this is crazy. I don't even know what a 2nd ignition is!