Troubleshooting machines without wiring diagrams

Segnaliano una discussione lanciata su LinkedIn da Lue Yang, Electronic Circuit Board Repair Specialist For OEM’s.

Troubleshooting machines without wiring diagrams

I’ve been in many plants helping maintenance friends/clients troubleshoot their machines without any wiring diagrams due to many reasons. Whatever the case may be, we were still troubleshooting with any wiring diagrams.
I wanted to reach out to all the Maintenance guys out there and draw on your experiences to see what creative ways you guys have worked around not having wiring diagrams for troubleshooting purposes?