LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Recently Replaced Light

Sensor Verdict: The LCM sensor generated a GREEN circuit (Right Turn) alert on trailer V506125 at site DCA1. Based on the technician's findings, the outcome is classified as 'Inconclusive' with a confidence level of 35. The technician reports no defect found after connecting via the PCT app, but the absence of required documentation — specifically the TechAssist app verification screenshot and complete illuminated light photos — prevents full validation of the sensor's alert being a false positive. The sensor may have detected a transient fault or intermittent condition that had self-resolved by the time of inspection.

Photo Evidence: Only one photo was provided (BODY.jpeg), showing the rear corner of the trailer body near the tail lamp cluster. The image shows two red circular LED lamps (likely brake/tail/turn indicators) mounted on the rear panel, red and white reflective tape on the door, a latch mechanism, and a chain/rod assembly. The LEDs visible in the photo appear to be physically present and undamaged. However, this single photo is insufficient — it does not show each lamp in the circuit illuminated during a function test, there is no clear nosebox wiring photo, and critically, there is no TechAssist app screenshot confirming 'Verified' status across all 5 circuits. The photo coverage is far below the standard required by the LCM troubleshooting procedure.

Vendor Compliance: The vendor (TA) partially followed the LCM troubleshooting procedure. The technician did connect to the unit using the Phillips Connect TechAssist app and tested both top and post positions on the GREEN circuit, confirming source voltage and no fault flags within the app. However, the vendor failed to comply with several key requirements: (1) no TechAssist app completion screenshot showing green 'Verified' status for all 5 circuits was submitted; (2) photos of each light illuminated were not provided; (3) there is no clear nosebox wiring photo; and (4) the technician's feedback category defaulted to 'no defect found (confirmed with PCT)' but is not verifiable without the screenshot. The technician notes are also written with poor clarity and numerous abbreviations, making interpretation difficult.

Repair Summary: No repairs were made on this work order. No parts were ordered or installed, and no line items were submitted. The technician's conclusion was that all LEDs were present, voltage was confirmed at both test points, and no faults were found through the app. Since no defect was identified and no repairs were performed, the alerting GREEN circuit was not actively repaired. The outcome is documented as a no-fault finding, but without the PCT app screenshot, this conclusion is unverifiable.

Key Concerns: There are several notable concerns with this work order. First, the complete absence of a TechAssist app verification screenshot is a direct non-compliance with the stated troubleshooting procedure and is the most critical documentation gap. Second, only one photo was submitted, and it does not show any lights actively illuminated during testing. Third, the technician notes are poorly written and contain multiple spelling/abbreviation errors that reduce confidence in the thoroughness of the inspection. Fourth, the LCM sensor did generate a real alert on this circuit, and while intermittent faults are possible, the lack of documentation means there is no way to confirm the fault was properly ruled out. Fleet management should consider requiring re-inspection with full PCT app screenshot documentation before closing this work order as a confirmed no-fault finding.