LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

No Fault Found

Sensor Verdict: The LCM system generated a RED (Brake) circuit alert on trailer HV2505180 at site DTW1. Based on all available evidence, the sensor alert does not appear to correspond to a confirmed, reproducible lighting defect at the time of vendor inspection. Confidence is moderate (72%) — while the TechAssist app confirmed all circuits functional, intermittent faults are possible and the absence of any line items or deeper diagnostic notes leaves some uncertainty about whether a transient fault triggered the alert.

Photo Evidence: The photo set is relatively comprehensive. Photos 1, 9 show the rear tail/brake light clusters illuminated (dual round red LED lamps), and Photos 2, 3, 15, 16 provide close-up views of individual rear brake/stop lights glowing fully — all LEDs appear lit with no partial failures visible. Photos 7, 10, 11, 17, 18 document the amber side marker/midturn lights illuminated along the trailer body, all appearing functional. Photo 12 shows the license plate light illuminated. Photo 6 provides a clear nosebox wiring image showing the Smart7 junction box interior — wiring appears intact and organized with no obvious corrosion, loose connectors, or bypassed inserts visible. Photos 4 and 8 show the trailer corner post with asset number HV2505180 confirmed. Photo 5 shows the interior roof area, possibly documenting an interior clearance light or interior condition. Photo 13 is the critical TechAssist app screenshot showing all five circuits (Red, Green, Yellow, Brown, Black) marked 'Verified' with 'No defects' on each. Photos 14 and 17 show small indicator lights (possibly marker or ID cluster lights) illuminated red — these appear functional. Overall, the photo documentation is thorough and covers the major required elements, though some clearance and front marker positions are not individually captured.

Vendor Compliance: The vendor (TA) demonstrated reasonable compliance with the LCM troubleshooting procedure. The Phillips Connect TechAssist app was clearly used, as evidenced by the app screenshot in Photo 13 showing all five circuits verified. Photos of illuminated lights are provided, and a nosebox wiring photo is included. The technician notes are brief and lack specific feedback from the required category list (e.g., they did not explicitly state 'no defect found (confirmed with PCT)' in the required terminology), but the substance of the inspection aligns with a proper no-fault finding. The nosebox check confirming tight nuts and good voltages is a positive indicator. Minor documentation deficiency: technician notes are terse and do not walk through each circuit individually in written form.

Repair Summary: No repairs were made on this work order. No parts were replaced, no labor line items were logged, and the vendor notes confirm all circuits were found operational. The alerting RED (Brake) circuit was evaluated and found functional at the time of inspection. Since no fault was confirmed, there was no applicable circuit to repair and no parts to document.

Key Concerns: The primary concern is the lack of any line items whatsoever — not even a labor charge for diagnostics — which raises a question about whether a thorough inspection was performed or if the visit was cursory. The technician notes, while confirming a no-fault outcome, are unusually brief ('ALL NUTS TIGHT IN SMART7 VOLTAGES GOOD ALL LIGHT CIRCUITS WORK') and do not reference specific voltage readings or detail which lamps were individually tested. The LCM alert on the RED circuit could indicate an intermittent fault (e.g., a loose connection that self-corrected, a momentary voltage drop, or a lamp that partially failed and recovered) that may reappear. Fleet maintenance reviewers should monitor this asset for repeat RED circuit alerts in the near term. No mismatched circuit colors, no signs of bypassed inserts, and the TechAssist verification screenshot provide adequate confidence that the system was functional at time of inspection.