LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Lighting - Damaged Light

Sensor Verdict: The LCM alert on the BLACK circuit (Clearance/License Plate) is confirmed as a legitimate defect detection with high confidence (90%). The technician's diagnosis directly corroborates the alert: the tag/license plate light was found to have two LEDs completely out and the remaining one operating dimly, which is a clear partial-to-full light failure on the BLACK circuit. Additionally, a broader wiring fault was discovered — a rear SIL harness with internal grounding issues that was pulling down voltage on the BROWN circuit — further validating that the trailer's electrical system had substantive faults at the time of the alert.

Photo Evidence: Two photos were submitted, neither of which fulfills the LCM troubleshooting photo requirements. Photo 1 shows an ABS warning indicator label with an amber/orange LED illuminated on what appears to be the trailer's rear panel or nosebox area — this is not a documentation photo of a lamp circuit. Photo 2 shows a green-illuminated kingpin/landing gear sensor light (likely a Phillips Connect SmartSensor or similar device), which also does not constitute a required circuit verification photo. There are no photos of any of the five lamp circuits illuminated, no clear nosebox wiring photo, and no TechAssist app screenshot showing green 'Verified' status on any circuit. Photo documentation is effectively non-compliant.

Vendor Compliance: The vendor did not follow the prescribed LCM troubleshooting procedure. There is no evidence the Phillips Connect TechAssist (PCT) app was used — the technician's notes describe traditional voltage-tracing diagnostics (measuring voltage at Smart 7 posts, unhooking harnesses) rather than PCT-guided troubleshooting. No TechAssist completion screenshot was provided, and none of the five circuits were photographed in an illuminated state as required. The technician's notes do reference observations consistent with expected feedback categories (light partial failure, wiring damage/internal grounding) and the diagnosis is technically sound, but procedural compliance with the LCM workflow was not achieved.

Repair Summary: No repairs were completed on this work order. The technician identified two required repairs: (1) replacement of the rear SIL harness due to internal grounding causing a voltage drop, and (2) replacement of the tag/license plate light due to LED failures. The work order was left open pending parts sourcing for both items. No parts were ordered or installed, no labor line items were logged, and the alerting BLACK circuit remains in a faulted state at WO close date of 2026-03-23. This is an incomplete work order.

Key Concerns: Several concerns are flagged for this work order. First and most critically, the WO was marked as completed on 2026-03-23 despite zero repairs being made — this is a compliance risk as the trailer may have been returned to service with known lighting defects. Second, the vendor explicitly stated in notes that LCM diagnostics cannot be continued until parts are installed and repairs are made, yet the WO was closed. Third, the photo submission is entirely non-compliant — neither photo documents a lamp circuit or nosebox wiring. Fourth, the PCT app was not used, so no verified circuit status exists. Fifth, the technician identified a cross-circuit issue (BROWN circuit voltage drop) beyond the alerting BLACK circuit, suggesting a more systemic electrical problem that has not been resolved. Follow-up to confirm parts were sourced and repairs completed is strongly recommended before this trailer is considered roadworthy from an LCM compliance standpoint.