The security lock flashing at unlock indicates the factory system is disarmed. An aftermarket alarm does present some other possibilities. Is it the factory keyless transmitters that you use, or the aftermarket ones? If the alarm has an integrated keyless feature, the system has to be tapped into so the alarm module can control the lock/unlock functions. There is no standard on aftermarket installations, it is at the discretion of the installer. Since you hear relays in the I/P fuse block when you activate locks, the vehicles keyless system sounds as though it's functional. With the fact that the aftermarket system is in place, normal vehicle architecture may be affected, and therefor factory information would be useless. The first approach that I take whenever aftermarket equipment is installed, is to remove the aftermarket equipment.
Monday, September 13th, 2010 AT 10:05 AM