LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Recently Replaced Light

Sensor Verdict: The LCM system generated a YELLOW circuit (Left Turn) alert on trailer HV2302347 at site IGQ1. Based on the available evidence, the sensor result is rated Inconclusive with a confidence of 35%. The vendor claims no defect was found, but the absence of any supporting documentation — app screenshots, illuminated light photos, or nosebox images — makes it impossible to confirm or deny the original alert. LCM alerts on the YELLOW/Left Turn circuit are commonly associated with intermittent wiring faults, damaged connectors, or partial LED failures that may not be present during a static inspection, further contributing to uncertainty.

Photo Evidence: Four photos were submitted with this work order. Photo 1 shows the exterior corner/nose area of the trailer from a low angle looking upward, with trailer identification markings visible but no lighting components in focus or illuminated. Photo 2 is a close-up of the trailer's VIN/specification plate, confirming the unit is a 2022 Hyundai Translead HT Trailer (Serial No. PS061405, VIN 3H3V532K3PS061405) operated under Amazon Logistics — useful for asset verification but irrelevant to circuit diagnosis. Photos 3 and 4 depict the trailer's undercarriage, showing suspension components, ABS wiring harnesses, brake chambers, and air lines — again, entirely unrelated to the YELLOW turn circuit. Critically, no photos of any illuminated lights were provided, there is no nosebox wiring photo, and there is no TechAssist app screenshot showing verified circuit status. This represents a complete failure to meet the photo documentation requirements outlined in the LCM troubleshooting procedure.

Vendor Compliance: The vendor's compliance with the required LCM troubleshooting procedure is poor. While the technician notes state the PCT TechAssist app was used and all circuits were verified working, none of the mandatory documentation was submitted to support this claim. The procedure explicitly requires: (1) photos of each light illuminated, (2) a clear photo of the nosebox wiring, and (3) a TechAssist app screenshot showing a green 'Verified' status beside each of the five circuits. None of these deliverables were provided. The technician notes are brief and non-specific, offering no detail about what was physically inspected, what the app showed, or whether any intermittent condition was observed. The submitted photos appear to be generic trailer documentation shots that do not pertain to lighting system verification.

Repair Summary: No repairs were made on this work order. There are no line items for parts or labor, and the technician concluded that all circuits were functioning properly. The alerting YELLOW (Left Turn) circuit was not confirmed as repaired because no defect was identified — however, without proper PCT app documentation, this 'no fault found' determination cannot be validated. If an intermittent fault was present at the time of the LCM alert but had resolved by the time of inspection, the underlying cause may remain unaddressed.

Key Concerns: There are several significant concerns with this work order. First and foremost, the complete absence of required photographic and app documentation is a major compliance failure and prevents any independent verification of the vendor's findings. Second, the photos that were submitted are entirely irrelevant to the faulted circuit, suggesting either that the wrong photos were attached or that the technician did not perform a thorough lighting inspection. Third, the vendor's notes, while mentioning PCT app use, provide no specific findings or circuit-by-circuit feedback as required. Given that no line items were billed and no defect was found, this work order may represent a premature closure. It is recommended that this unit be re-inspected with full PCT TechAssist documentation, particularly since the YELLOW circuit alert may reflect an intermittent or developing fault that warrants closer monitoring.