Workshop Test: Build a Parasitic-Draw Current Trace

A time trace shows normal shutdown, sleep, periodic wake-up, and abnormal steady current better than one instant reading.
Repeatable workshop test procedures with setup, observations, and interpretation.

A time trace shows normal shutdown, sleep, periodic wake-up, and abnormal steady current better than one instant reading.
A cable can pass a low-current resistance test yet lose significant voltage during cranking, fan operation, or charging load.
System diagram and pressure limit;Throttle, PCV, purge, brake-booster, and crankcase paths;Smoke flow and exact exit point
Tool range and target points;Repeated readings;Direction and adapter setup;Calibration date and handling history

EVSE type and supply;Tester rating and supported pilot states;Protective-earth result;Fault response and reset behavior