LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Recently Replaced Light

Sensor Verdict: The LCM system flagged the BLACK circuit, which governs Clearance and License Plate lighting on trailer V571398. Based on the available evidence, the sensor result is rated as Inconclusive with 35% confidence. The vendor explicitly states 'no issues found with black circuit,' which could suggest a false positive or an intermittent fault that had cleared by the time of inspection. However, without Phillips Connect TechAssist (PCT) app confirmation showing a green 'Verified' status on all five circuits, it is impossible to confirm the sensor alert was erroneous. The LCM system is generally reliable, and intermittent faults are not uncommon, but the lack of app-based verification leaves the outcome unresolved.

Photo Evidence: Fourteen defect photos were submitted with this work order. Photos 1 and 9 show the front clearance/marker lights (amber/orange) on the top corners of the trailer — both appear to be illuminated and functional. Photos 2, 3, 10, 11, and 13 depict red tail/brake/stop lights at the rear of the trailer, all appearing to be lit and operational. Photo 4 shows a small red marker or clearance light on the undercarriage area, appearing functional. Photo 5 shows a white license plate light illuminated. Photos 7 shows a small red clearance/marker light that is lit. Photos 12 and 14 show amber/orange turn or marker lights that are functional. Photo 6 is a VIN/inspection plate photo confirming trailer identity (V571398, VIN 3H3V532C5MR734173). Photo 8 shows rear tail lights. Photo 15 shows the front top corner of the trailer with a small amber clearance light visible. Photo 16 shows what appears to be the rear door area with small red indicator lights visible. Notably absent are: a clear nosebox wiring photo, any TechAssist app screenshot showing green 'Verified' status for all circuits, and a dedicated systematic layout of each light in the BLACK circuit specifically. While lights appear to be illuminated in the photos, there is no structured, circuit-specific documentation.

Vendor Compliance: The vendor did not comply with the LCM troubleshooting procedure as instructed. The work order specifically required use of the Phillips Connect TechAssist app, a completion screenshot showing green 'Verified' status beside each of the five circuits, photos of each light illuminated, and a clear nosebox wiring photo. None of these specific requirements were met. The vendor instead performed a generic 'light campaign' — a broad visual inspection or preventive lighting check — and declared no issues with the BLACK circuit without app-based verification. No nosebox photo was submitted. The feedback provided ('no issues found') does not align with the expected feedback categories (e.g., 'no defect found (confirmed with PCT)' requires PCT confirmation). The failure subcategory is therefore classified as 'no defect found (not confirmed with PCT).'

Repair Summary: No repairs were made on this work order. No parts were replaced and no line items were submitted. The vendor performed what they describe as a 'light campaign' — likely a visual walk-around inspection of the trailer lighting — and found no actionable defects on the BLACK circuit. The alerting circuit (BLACK/Clearance/License Plate) was not formally addressed or verified using the required diagnostic tooling. While the lights visible in the photos appear functional, the absence of any corrective action and the lack of PCT verification means the root cause of the original LCM alert remains unconfirmed.

Key Concerns: Several concerns are flagged with this work order. First and most critically, the Phillips Connect TechAssist app was not used, and no verification screenshot was provided — this is a direct non-compliance with the stated troubleshooting procedure. Second, no nosebox photo was submitted, which is a required element for LCM diagnostics. Third, the vendor's reference to a 'light campaign' suggests a generic inspection protocol rather than a targeted LCM circuit-specific diagnostic. Fourth, there are no line items whatsoever, which is consistent with no repairs being made but also raises questions about whether a thorough inspection was actually conducted. Fifth, the photos, while showing various lights functional, do not provide a systematic, circuit-labeled view of all BLACK circuit components. Fleet maintenance reviewers should consider requiring the vendor to return to the asset for a proper PCT-verified inspection before closing this alert as resolved.