2002 Suburban Power door locks dont work

I have a 2002 Chevy Suburban.  My power door locks worked when i started installing a new head unit.  I just used a metra harned adapter and hooked up the wire right. after this they still worked for a while then they just stoped.

I then checked every fuse none were blown i even replaced the door lock relays. I decided to go ahead and start installing my viper alarm/remote start hoping when it came time to hook door lock/unlock wires up i would find the problem. This is what i found out.

The relays all switch over when i press the unlock/lock button un the car and on the stock remote.  The door lock/unlock wire send 12v signal to the cars bcm and when locked it still arms the factory alarm. It seems to send signal to the bcm to arm the alarm but the unlock motors are not trigger or something. All i know is there anr no blown fused and relays are all fine. the bcm get signal and factory alarm arms. If anyone can help in any way it would be greatly appreciated.

Oh and sense i was doing radio work i have onstar if that effects it in anyway. Thank you.