LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Lighting - Damaged Light

Sensor Verdict: The LCM sensor alert on the BLACK (Clearance/License Plate) circuit is rated as 'Defect Detected' with 90% confidence. The technician's own findings directly corroborate the alert — a license plate light was found inoperative, which is a primary component of the BLACK circuit. The alignment between the faulted circuit and the confirmed repair is strong, leaving little ambiguity about the sensor's accuracy in this case.

Photo Evidence: Two photos labeled 'BRAKES.jpeg' were submitted with this work order. Both images show undercarriage brake and suspension components — specifically what appears to be brake chambers, slack adjusters, axle hardware, and tires viewed from below the trailer. These photos are entirely unrelated to the lighting repair performed or the BLACK circuit defect. No photos of the license plate light (before or after replacement), no illuminated circuit photos, no nosebox wiring images, and no TechAssist/PCT app screenshot showing green 'Verified' status for each of the 5 circuits were provided. The photo documentation is wholly non-compliant with the required troubleshooting procedure.

Vendor Compliance: The vendor (TA) did reference using the PCT app to check voltage on all prongs and to re-verify all circuits post-repair, which is a positive indicator of partial procedural adherence. However, compliance with the full LCM troubleshooting procedure is insufficient. The vendor was explicitly instructed to provide photos of each light illuminated, a clear picture of the nosebox wiring, and a TechAssist app completion screenshot showing green 'Verified' status beside each of the 5 circuits. None of these required deliverables were provided. The submission of brake/suspension photos instead of lighting photos further suggests the wrong photos may have been attached, potentially as a documentation error or oversight.

Repair Summary: The repair made was the removal and replacement of an inoperative license plate light, which directly addresses the faulted BLACK circuit. The technician also tightened nuts on the Smart 7 nosebox prongs and performed a full light check. The repair appears appropriate and targeted to the confirmed defect. No parts line items were recorded in the work order, which means the replaced license plate light has no part number, brand, or compliance record — it cannot be confirmed whether an approved/compliant lamp was used. The absence of line items is a notable documentation gap.

Key Concerns: Several concerns merit attention for this work order. First, the two submitted photos are completely mismatched to the repair — brake/suspension images provide zero value for a lighting circuit work order and suggest either the wrong photos were uploaded or documentation was handled carelessly. Second, there are no line items recorded, making it impossible to verify part compliance, cost, or warranty eligibility. Third, the required TechAssist app verification screenshot is absent despite the technician claiming app use, which cannot be independently confirmed. Finally, while the repair itself appears valid and the sensor alert was legitimate, the overall quality of vendor documentation on this WO is poor and does not meet the established LCM troubleshooting submission standard.