LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Lighting - Failed Light

Sensor Verdict: The LCM sensor alert on the BLACK circuit (Clearance / License Plate) is assessed as a legitimate 'Defect Detected' with 88% confidence. The technician independently confirmed the alert by finding the passenger-side (PS) front clearance light inoperative during the physical light check. This directly corroborates the LCM's fault detection on the BLACK circuit, which governs clearance and license plate lighting. The slight reduction in confidence from 100% reflects the absence of a TechAssist app screenshot formally confirming the fault and the post-repair verification, as well as the inability to fully rule out whether additional issues existed beyond the single lamp replacement.

Photo Evidence: The submitted photos document several aspects of the trailer's lighting system. Photos TC_04976 and TC_04981 show amber oval LED clearance/marker lights illuminated on the trailer sides — these appear functional and in good condition. Photos TC_04977 and TC_04980 show small red LED marker lights on the rear undercarriage area, also illuminated. Photo TC_04978 shows the license plate light illuminated with a white LED, and the Indiana plate (PF28515) is visible and legible. Photo TC_04979 provides a full rear view of trailer HV2603882, showing rear lights and reflective tape in generally acceptable condition though the trailer exterior is dirty. Photo TC_04982 shows the nosebox wiring in detail — the wiring appears dense and complex with multiple connections and a Phillips Connect LCM device visible; some oxidation/discoloration is present on wire terminals but no obvious severe damage is immediately apparent. Photo TC_04983 shows the front top corner of the trailer. Photo TC_04984 is the VIN/spec plate confirming trailer HV2603882 as a Hyundai Translead HT Trailer. Photo TC_04985 shows a single amber round clearance light illuminated, likely the repaired PS front clearance light. Photo TC_04975 shows the rear roll door of the trailer. Photo TC_05116 (dated March 13, 2026 — the day after the WO completion date) provides a clean rear-view showing all rear lights illuminated. Critically absent are: a TechAssist app screenshot showing all 5 circuits verified as green, a 'before' photo of the failed clearance light, and a complete set of all clearance lights illuminated in a systematic circuit-by-circuit documentation format.

Vendor Compliance: Vendor compliance with the prescribed LCM troubleshooting procedure is partial and falls short of full compliance. The technician did perform a physical light check and identified the failed component, which is the core diagnostic step. However, the TechAssist app could not be used due to reported 'technical difficulties,' and instead the technician called Phillips Connect directly to obtain a verbal/phone confirmation (PCT confirmation #123424). While this workaround demonstrates initiative, it does not satisfy the documented requirement to provide a TechAssist app screenshot showing green 'Verified' status for all 5 circuits. The vendor did not provide photos of each light circuit systematically illuminated, and no TechAssist completion screenshot is present in the photo evidence. The nosebox photo (TC_04982) is provided and shows sufficient detail, which is a positive compliance element.

Repair Summary: The repair performed was the removal and installation of a new PS front clearance light. This directly addresses the alerting BLACK circuit (Clearance / License Plate). The replacement light visible in TC_04985 appears to be a round amber LED clearance light, consistent with OEM-style LED replacement. No parts line items were submitted in the work order, which is a documentation gap — the part number, brand, and quantity of the replacement clearance light are unverifiable. Without line item data, it cannot be confirmed whether a compliant or approved-brand lamp was used. The repair appears functionally successful based on technician notes and the post-repair photo showing the light illuminated.

Key Concerns: Several concerns warrant flagging for this work order. First, the absence of line items means there is no parts accountability — the replacement lamp brand, part number, and cost are completely undocumented. Second, the failure to use or successfully access the TechAssist app and the resulting lack of a green 'Verified' screenshot for all 5 circuits is a procedural gap; a PCT confirmation number obtained by phone is not equivalent to the required app-based verification. Third, photo TC_05116 is dated March 13, 2026, one day after the WO completion date of March 12, 2026, which is a minor anomaly suggesting post-completion documentation. Fourth, the nosebox wiring (TC_04982) shows some terminal discoloration that should be monitored for future corrosion-related faults. Overall, the core defect was real and repaired, but documentation and procedural compliance need improvement.