Yeah sorry Time domain reflectometer. Thing was great hook it up can tell you the condition of a wire. Say the insulation had a Knick it would show it and how far down the wire it was, also show where the wire went through a connection, broken strands etc.
Ya,so i was trying to trace the abs wires with my power probe circuit tracer, a twisted pair. Signal ends up on both wires. Rendered it kind of useless.signal travelled through the break on other wire. So it was a mission of search and destroy.