LCM Alert Validation

Confidence

Failure Category

Lighting

Subcategory

No Fault Found

Sensor Verdict: The LCM BLACK circuit alert for trailer WV2500085 is assessed as a legitimate defect detection with 88% confidence. The technician confirmed the license plate/clearance light was 'not lit up all the way,' which aligns directly with the BLACK circuit monitoring clearance and license plate lamps. The partial illumination finding is consistent with an LCM resistance or current anomaly that would trigger an alert on this circuit. No contradicting evidence was found in the notes or line items to suggest a false positive.

Photo Evidence: No photos were provided or referenced in this work order submission. 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' status beside each of the five circuits. None of these documentation requirements appear to have been met. This is a significant compliance gap and prevents independent visual verification of the defect, the repair quality, or the final system state.

Vendor Compliance: The vendor (TA) partially followed the LCM troubleshooting procedure. The technician references using the Phillips Connect TechAssist app to perform a circuit check and states all lights were verified — which is a positive indicator. However, the procedure requires a completion screenshot from the TechAssist app showing green 'Verified' for all five circuits, and no such screenshot was submitted. Additionally, the required structured feedback from the defined category list (e.g., 'light partial failure') was not explicitly stated, though the narrative description aligns with that category. The nosebox wiring was reportedly checked and voltage confirmed good, but no photo documentation supports this claim. Overall, procedural compliance is incomplete.

Repair Summary: The technician removed the non-functioning LP/clearance lamp assembly and installed a new one, securing it with rivets and connecting it using butt connectors (Seal-A-Crimp 22-18 gauge). The replacement part used was a rectangular marker light with reflector — incandescent type (RECT MKR W/REFLCTR AMBER INCAN, $10.99). The alerting BLACK circuit was directly addressed. However, the use of an incandescent replacement lamp is flagged as a compliance concern: if the trailer's original specification or fleet standard requires LED lighting, this repair does not meet compliant brand/spec requirements, and 'compliant_brand' is marked NO accordingly. The Smart 7 nosebox was inspected, wiring connections verified, and voltage confirmed as good.

Key Concerns: Several issues warrant follow-up. First, the complete absence of photo documentation is a material non-compliance item — no before/after repair photos, no illuminated circuit photos, and no TechAssist verification screenshot were submitted. Second, the installation of an incandescent lamp in place of what may have been an LED unit could indicate a spec downgrade and potential shorter service life, increasing the likelihood of a repeat alert on this circuit. Third, the work order includes line items for a tire pressure sensor activation (AMAZON PCT SENSOR ACTIVATION) that appear unrelated to the LCM lighting alert — this should be reviewed for billing accuracy and scope creep. Finally, the technician notes reference 'AMPA TA' check which may indicate a secondary approval or inspection step, but this is not elaborated upon. Vendor should be coached on photo documentation requirements and LED-compliant replacement parts for future LCM work orders.