Transportation Equipment Electrician how-to
How to Trace a Fault with a Schematic
Schematics guide troubleshooting.
Quick answer
Schematics guide troubleshooting. In short: read; find; check, then complete the remaining steps below.
Step by step
Read the fault.
Find the circuit on the schematic.
Check power and ground.
Test at key points.
Isolate the failed part.
Repair and retest.
Safety reminders for transportation equipment electricians
- Follow lockout/tagout
- Treat rails as live
- Wear arc flash PPE
- Follow track safety rules
Key terms
Schematic · Traction motor · Third rail · Pantograph · Control circuit · Relay: see the full transportation equipment electrician glossary.