LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Lighting - Failed Light

Sensor Verdict: The LCM system generated an alert on the BLACK circuit, which governs Clearance and License Plate lighting on trailer WV2500173 at site XMD2. Based on the available evidence, the sensor result is rated Inconclusive with a confidence of only 32. While the technician verbally claimed all lights were working normally, the complete absence of required documentation — no PCT verification screenshot, no circuit photos, and no lighting-specific repair activity — means the alert cannot be credibly confirmed or dismissed. A verbal 'all clear' without supporting evidence does not meet the threshold to classify this as a confirmed no-fault finding.

Photo Evidence: No photos were provided or attached to this work order. The LCM troubleshooting procedure explicitly required photographs of each light illuminated, a clear picture of the nosebox wiring, and a TechAssist app completion screenshot showing a green 'Verified' status beside each of the 5 circuits. None of these were submitted. This is a significant documentation failure that leaves the sensor alert unresolved and unverifiable. Without visual confirmation, it is impossible to assess whether the BLACK circuit clearance lights and license plate lights were actually functional, whether any wiring anomalies exist at the nosebox, or whether the TechAssist app genuinely reached a verified state.

Vendor Compliance: Vendor compliance with the prescribed LCM troubleshooting procedure is poor. The technician (JR) referenced using the TechAssist app, which is a positive indicator, but the procedural requirements go well beyond simply running the app. The vendor was specifically instructed to document each light illuminated via photos, provide a clear nosebox wiring photo, and submit a TechAssist completion screenshot with all 5 circuits verified green. None of these deliverables were provided. The technician notes are vague and do not reference any specific feedback category from the required list (e.g., 'no defect found — confirmed with PCT'). The completion note 'COMPLETE3 J F TA' offers no diagnostic insight whatsoever. Overall, the vendor did not meet the documentation and verification standards required by the LCM troubleshooting procedure.

Repair Summary: No repairs were made to the lighting system or the BLACK circuit. The line items billed are entirely unrelated to the faulted circuit: a tire pressure sensor activation (AMAZON PCT SENSOR), standard service labor, a shop supply/environmental fee, and lot service hourly labor coded under aerodynamic devices. Not a single part or labor line is associated with clearance lights, license plate lights, wiring, connectors, or the nosebox. It is unclear why TPMS-related charges appear on a lighting work order, which raises questions about whether this work order was properly scoped or if charges were inadvertently applied to the wrong WO.

Key Concerns: Several red flags are present in this work order. First, the complete absence of photos and PCT verification documentation is a direct violation of the troubleshooting procedure and leaves the LCM alert unresolved. Second, the line items have zero relevance to the BLACK lighting circuit — billing for a TPMS speed sensor activation on a lighting WO is a significant mismatch that warrants review for potential billing errors or work order misassignment. Third, the technician notes lack specificity and do not cite any defined feedback category from the required list. Fourth, without a confirmed PCT 'Verified' screenshot, there is no objective evidence that the TechAssist session was completed successfully. This work order should be flagged for vendor follow-up to obtain proper documentation, and the unrelated line items should be audited for accuracy.