LCM Alert Validation

Confidence

Failure Category

No Fault Found

Subcategory

No Fault Found

Sensor Verdict: The LCM sensor issued an alert on the RED (Brake) circuit for trailer HV2300291. Based on available evidence, this is rated as Inconclusive with 35% confidence. The TechAssist app screenshot (Photo 9) shows 'No data — The system cannot successfully precheck this circuit' across all five circuits (Red, Green, Yellow, Brown, and Black), which is a significant finding suggesting a systemic communication or wiring issue rather than a simple lamp failure. The vendor's claim that all lights were operational contradicts the sensor's inability to verify any circuit, leaving the root cause unresolved.

Photo Evidence: Ten photos were provided covering various aspects of the trailer. Photos 7 and 5 show the front corner of an Amazon-branded trailer with what appears to be a functioning amber marker light. Photo 3 shows an amber midturn marker light that is illuminated. Photos 6 (Defect 10) and 2 (Defect 7) show rear tail light clusters with red LEDs illuminated, suggesting the physical lamps appear functional at the time of inspection. Photo 6 (IMG_0156) shows the nosebox wiring — critically, this reveals a heavily congested junction box with numerous wires, corroded terminals, and what appears to be disorganized wiring that could cause intermittent circuit faults. Photo 4 (IMG_0308) shows the rear of the trailer with mudflaps and tail lights. Photo 8 (IMG_0309) provides another rear view of the trailer. Photo 11 (IMG_0147) shows a small red clearance/marker light that appears illuminated. Notably absent are photos of each individual light in the RED brake circuit illuminated in a systematic, circuit-by-circuit fashion as required by the LCM troubleshooting procedure. The TechAssist app screenshot (Photo 9) is present but shows failed verification — not the required green 'Verified' result for each circuit.

Vendor Compliance: The vendor did not follow the LCM troubleshooting procedure as instructed. The procedure explicitly requires use of the Phillips Connect TechAssist (PCT) app to verify all five circuits with green 'Verified' status shown in a completion screenshot. The provided PCT screenshot shows 'No data' for all circuits, meaning the system could not complete verification — this is not a passing result and should have prompted further investigation. The vendor's notes ('FOUND ALL LIGHTS ARE OPERATIONAL') are inconsistent with the app's inability to precheck any circuit. Additionally, the vendor did not provide systematic photos of each light in the RED circuit illuminated, nor did they provide specific feedback from the required failure category list. The troubleshooting is considered non-compliant.

Repair Summary: No repairs were made. No parts were replaced. No line items were submitted. The vendor essentially performed a visual walk-around and activated the lights manually, declaring them operational without completing the required electronic verification through the PCT app. The alerting RED (Brake) circuit was not formally confirmed as repaired or cleared, as the PCT app showed communication failure across all circuits — a condition that itself warrants investigation and was not addressed.

Key Concerns: There are several significant concerns with this work order. First, the nosebox (Photo 6/IMG_0156) shows visibly corroded terminals and cluttered wiring, which is a likely contributor to the LCM sensor's inability to precheck any circuit — this was not documented or addressed by the vendor. Second, all five circuits showing 'No data' in the PCT app is an abnormal finding that suggests a possible LCM insert bypass, a missing nut in the nosebox, or a wiring fault at the nosebox level, none of which were investigated. Third, the vendor's abbreviated notes ('ET TA CAUSE C A LIGHTS CORRECTION ACTIVATED LIGHTS FOUND ALL LIGHTS ARE OPEARATIONAL TY') lack the detail required for a proper LCM troubleshooting work order. This work order should be flagged for re-inspection with emphasis on nosebox integrity, LCM insert verification, and full PCT app circuit confirmation.