LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Lighting - Failed Light

Sensor Verdict: The LCM system on trailer WV2502945 generated a RED (Brake) circuit alert, indicating a detected short or anomaly in the brake light circuit. Based on the available evidence, the sensor result is rated as Inconclusive with moderate confidence (42%). The vendor's notes state all circuits tested properly, which would suggest a false alert or a transient fault; however, the absence of required TechAssist verification screenshots prevents a definitive confirmation of no defect. It is possible the fault was intermittent and cleared prior to or during the inspection.

Photo Evidence: Ten photos were submitted with this work order. Photos 1 and 5 show amber/orange clearance marker lights and a small red indicator light on the trailer's side and corner — these are marker/clearance lights, not brake lights, and do not directly address the faulted RED circuit. Photos 2, 8, 9, and 10 show the rear of the Amazon trailer (AZNG WV2502945) with rear lights visible; however, none of these photos clearly show the brake/stop lights actively illuminated in a tested state. Photos 3, 4, 6, and 7 show a MUTT (Mobile Unit Trailer Tester) device: Photo 3 shows 'Left Turn 598mA Detected,' Photo 4 shows 'Right Turn 594mA Detected,' Photo 6 shows 'Brake L 698mA Detected,' and Photo 7 shows 'WABCO 391mA — 0 Active Faults.' These MUTT readings are helpful and suggest the brake circuit was drawing current and functioning at the time of testing. Critically, no Phillips Connect TechAssist app screenshots are present showing a completed verification with green 'Verified' status for each of the five circuits, which is explicitly required by the LCM troubleshooting procedure. No nosebox wiring photo was provided either.

Vendor Compliance: The vendor's compliance with the prescribed LCM troubleshooting procedure is incomplete. While the technician states they used the TechAssist app and connected to the trailer, there are no screenshots from the PCT app showing the completed five-circuit verification with green 'Verified' indicators. The required photos of each light illuminated during the circuit test are also absent. The vendor did use a MUTT tester as a supplementary tool, which is acceptable but does not fulfill the PCT app documentation requirement. The notes do reference following the procedure and testing all five circuits (RED, GREEN, YELLOW, BROWN, BLACK), but without photographic proof, this cannot be independently verified. The feedback provided does not use the defined expected feedback category language required by the procedure (e.g., 'no defect found (confirmed with PCT)').

Repair Summary: No repairs were made on this work order. The single labor line item — 'Lighting System > Bulbs, Fuses & Wiring — Clearance/Marker/Inter' at $102.00 — appears to be a diagnostic/inspection labor charge rather than a repair. No parts were replaced. The alerting RED (Brake) circuit was reportedly tested and found functional, but no corrective action was taken. Since no defect was confirmed, the compliant brand question is not applicable.

Key Concerns: Several concerns are flagged for this work order. First and most significantly, the required TechAssist app completion screenshots are entirely missing — this is a critical documentation gap that prevents confirming the PCT app was used as required. Second, no individual light illumination photos were submitted for any circuit. Third, the labor line item references 'clearance/marker/inter' lighting, which does not align with the faulted RED (Brake) circuit, suggesting a possible line item coding error. Fourth, the MUTT tester readings, while encouraging, show the brake circuit was drawing current (698mA), but without context of what the expected range is, this alone is insufficient to close out the LCM alert. The work order should be flagged for incomplete documentation, and the vendor should be required to resubmit with proper PCT app verification screenshots before the no-fault outcome can be formally accepted.