LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

Lighting - Missing Light

Sensor Verdict: The LCM sensor alert on the RED (Brake) circuit is confirmed as a legitimate defect detection with high confidence (92%). The technician's own notes explicitly state the 3rd brake light was found to be missing — a physical absence of the lamp is a textbook cause of an open or failed brake circuit reading on the LCM system. The sensor performed correctly. The minor confidence deduction stems from the lack of TechAssist app verification and photographic documentation that would definitively close the loop.

Photo Evidence: No photos were provided or attached with this work order. The LCM troubleshooting procedure explicitly requires photos of each light illuminated, a clear picture of the nosebox wiring, and a TechAssist app completion screenshot showing green 'Verified' beside each of the 5 circuits. None of these deliverables were met. The absence of photo documentation makes it impossible to independently verify the repair quality, the condition of the nosebox, or whether all five circuits were ultimately in a healthy state post-repair. This is a significant documentation gap.

Vendor Compliance: The vendor (TA / technician JLC) did not follow the LCM troubleshooting procedure as instructed. There is no indication the Phillips Connect TechAssist app was used during diagnosis or verification. While the technician notes that 'all circuits pass' after the repair, this appears to be based on a generic trailer test rather than a TechAssist-guided verification. No TechAssist completion screenshot with green 'Verified' status for all 5 circuits was provided. The technician's feedback — while informative in narrative form — was not structured around the required feedback categories (e.g., 'light missing' was the correct category here, but was not formally cited). Overall vendor compliance with the prescribed troubleshooting protocol is poor.

Repair Summary: The repair involved sourcing a new 3rd brake light (line item: 'FLASHING AUXILIARY STROBE STOP' at $160.64, suggesting an LED strobe-style brake lamp) and riveting it to the trailer using 1/4" Avex blind rivets. The faulted RED (Brake) circuit was directly addressed. Additional line items include an R&R marker/clearance light assembly and associated labor, suggesting a secondary lighting issue was also addressed during the same visit. A TPMS sensor activation item (Amazon PCT Sensor) also appears on the work order, which is unrelated to the LCM lighting alert and may represent additional opportunistic work performed during the visit. The core brake light repair appears complete and appropriate.

Key Concerns: Several flags are worth noting for this work order. First, the TPMS sensor activation line item (Amazon PCT Sensor, Qty 1.0) is entirely unrelated to the LCM lighting alert and warrants scrutiny — it is unclear whether this was pre-authorized or represents scope creep. Second, the 'FLASHING AUXILIARY STROBE STOP' part at $160.64 is a relatively high-cost lamp; reviewers should confirm this is the correct OEM-equivalent or approved part for this trailer's 3rd brake light position. Third, the complete absence of photos and TechAssist app usage represents a failure to meet the documentation standard set by the LCM troubleshooting SOP — future work orders from this vendor should be flagged for photo compliance coaching. Fourth, the nosebox condition is unverified despite the technician's note that wires are 'tight inside of nose box' and 'has right power' — without a photo, this cannot be validated. No signs of repeat issues are identifiable from this single work order.