In manufacturing facilities, wiring systems transmit and receive signals to communicate between modules and systems. Stress conditions may degrade the performance of wiring systems, causing intermittent faults, interlocking, and eventually facility downtime. Timely maintenance of wiring systems is required to ensure the reliability and availability of manufacturing facilities.This presentation discusses a non-destructive method to allow for condition-based maintenance of wiring systems. Experimental results demonstrate the proposed method can serve as a real-time health indicator of wiring systems, and can be used for proactive maintenance planning toward near zero downtime.