I'm assuming your looping pairs on the line side of the 66 block, punching down the IW on the other side and than bridging across. If you had DT prior to adding the bridging clips, than you should have it after removing them. Take all bridging clips off, establish DT on the line side, put a butt set on the line in monitor and install the bridge clips one at a time to see if any of the IW's are shorted or ring ground. 66 vs 110, depends on application.
Bill

Retired phone dude