Another even more desperate and time-consuming method is to go to the far end of each cable. Short-circuit the white/blue pair in cable #1. Short the orange pair in cable #2, and so on.
Then s/c the white/blue wire and the white/orange wire in the next cable. Keep doing this until you have used up all the combinations. If there is a handy ground connection near each distant end, continue and ground one wire in each of 8 more cables. Use a test lead with two alligator clips and go from the center screw in a receptical faceplate for the ground source.
Write down the colors and the locations on a note pad or on the blueprint. Use a meter to find the shorts and grounds.
This method, while time-consuming at first, will allow you to find and eliminate a few cables from a group, reducing the chance of finding the wrong cables as you go on through the whole group.
