LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Lighting - Missing Light

Sensor Verdict: The LCM RED (Brake) circuit alert is assessed as 'Defect Detected' with 88% confidence. The sensor correctly identified a real lighting fault on trailer GV2501137. The technician confirmed the passenger-side rear ID light had been physically pushed inside the bumper, causing it to be non-functional and likely disrupting the red/brake circuit continuity monitored by the LCM system. The physical displacement and resulting damage to the light is a credible root cause for the circuit alert.

Photo Evidence: The provided photos offer partial but meaningful documentation. Photo TC_00412 and TC_00411 show the rear of the trailer (Amazon-branded, AZNG GV2501137, Indiana plate PD97375) with the rear lamp cluster visible, including red tail/brake lights that appear functional. Photo TC_00410 shows a close-up of what appears to be the license plate light illuminated (white LED), confirming that light is functional. Photo TC_00408 shows a rear corner area with significant scuff/scrape damage on the trailer skin near a red marker light, with the light appearing to be illuminated — this is likely the area where the displaced light was found and repaired. Photos TC_00413 and TC_00414 show an amber clearance/marker light on the trailer side illuminated (orange LED, functional). Photos TC_00405, TC_00415, and TC_00416 appear to show the trailer front nose/corner area from low angles, consistent with documenting the nosebox or front corner structure — though nosebox wiring detail is not clearly visible. Photo TC_00404 shows the trailer's manufacturer data plate (Great Dane, VIN 1GR1A0628SK629660) and a periodic inspection sticker. Photo TC_00406 and TC_00409 show the trailer door hinge area from an exterior angle. Photo TC_00407 shows the trailer undercarriage/lower rear corner with scuff damage and a hole — consistent with impact damage in the area where the light was displaced. The TechAssist app screenshot (IMG_5116) confirms all 8 sensors verified green including Light Circuit. Notably, no photo clearly shows the repaired PS rear ID light illuminated in its corrected installed position post-repair, and no clear nosebox wiring photo is present.

Vendor Compliance: The vendor (TA) partially followed the LCM troubleshooting procedure. Positively, the TechAssist app was used and the completion screenshot (IMG_5116) shows all sensors verified green (ABS, ATIS Lamp, ATIS Regulator, AirTank, CargoVision, Cargo, Light Circuit, TPMS — all green checkmarks). However, the procedure requires photos of each light illuminated and a clear photo of the nosebox wiring — neither requirement was fully met. There is no dedicated nosebox wiring photo, and not all lights in the circuit are individually documented as illuminated in the photos. The technician's notes are somewhat informal and contain spelling/grammatical errors, but the core troubleshooting steps appear to have been executed. The technician also flagged a secondary issue (both door sensors missing) which is important fleet intelligence but falls outside the scope of this WO.

Repair Summary: The repair consisted of removing the damaged passenger-side rear ID light that had been pushed inside the bumper (likely due to an impact event, as evidenced by the scrape damage visible in photos TC_00407 and TC_00408) and replacing it with a new unit. The replacement light appears to be an LED type based on the photos showing LED-style rear lights. The Phillips Connect TechAssist app was used to activate and verify all sensors post-repair, with a green 'Verified' status achieved across all monitored circuits including the Light Circuit. The alerting RED circuit appears to have been addressed by this repair. No line item parts data was provided, so the specific replacement part and brand compliance (e.g., Grote) cannot be confirmed.

Key Concerns: Several concerns merit follow-up. First, the absence of line items makes it impossible to verify part number, brand compliance, or cost accountability for this repair. Second, the technician noted that 'both door sensors are missing' — this is a separate but significant SmartSensor gap that should generate a follow-up work order. Third, the root cause of the light being pushed inside the bumper (likely a minor collision or dock impact) is noted as 'TBD' and was not formally resolved — this could be a repeat issue if the trailer continues to sustain dock impacts. Fourth, the nosebox wiring photo requirement was not satisfied, leaving the internal wiring condition undocumented. Despite these gaps, the core sensor alert appears valid, the repair was made, and the TechAssist verification confirms the circuit is restored to operational status.