Defect Detected
100%
Confidence
Failure Category
Lighting
Subcategory
Lighting - Failed Light
Approved by Historical Upload
Work Order Details
Asset ID
V563798
Site
PDX9
Vendor
COX
Circuit
RED (Brake)
Date Actioned
2026-03-10T00:00:00
Week
11
amz-id
amz-738528w48wrqcx
Relay Garage
AI Deep Dive Analysis
Sensor Verdict: The LCM alert on the RED (Brake) circuit correctly identified a real lighting defect with high confidence (92%). The technician's notes confirm that upon activating the brake circuit via the TechAssist app, all brake lights functioned except the strobe light, which was found to be inoperative. This directly validates the sensor's alert. The fact that the issue was reproducible and a physical lamp replacement resolved it strongly supports a true positive detection by the LCM system.
Photo Evidence: The submitted photos are largely insufficient for this work order. Photos 1 and 4 show the trailer parked at a dock with yellow wheel chocks visible — these establish the trailer's location but provide no diagnostic value for the lighting circuits. Photo 3 shows trailer tires in reasonable condition with what appears to be a cross-hose inflation system visible. Photos 5 shows the trailer's QR/VIN plate confirming asset V563798 (VIN: 3H3V532C3LR444853). Photos 8 and 9 show a close-up of what appears to be a severely corroded and degraded valve stem or grommet fitting — possibly related to a tire valve or nosebox wiring grommet — which is a notable finding but lacks context labeling. Photo 2 is the TechAssist Sensor Details screen showing all 8 sensors across Axle 1 and Axle 2 with pressure readings (ranging from 100–115 PSI), which is a TPMS verification screen — not an LCM circuit verification screen. Photo 6 is the TechAssist Job Summary screen showing TPMS verified for V563798 on 4/20/2026. Critically absent are: photos of each lamp illuminated per circuit, a clear nosebox wiring photo, and an LCM-specific TechAssist completion screenshot showing green 'Verified' status for all five lighting circuits (RED, GREEN, YELLOW, BROWN, BLACK).
Vendor Compliance: The vendor partially followed the LCM troubleshooting procedure. Positively, the technician did use the Phillips Connect TechAssist app and did systematically test all five circuits (RED, GREEN, YELLOW, BROWN, BLACK) as instructed. Defect feedback categories were approximately matched (light failure, damaged light/corrosion). However, the vendor fell short of full compliance: no photos were taken of each light illuminated during circuit activation, there is no clear nosebox wiring photo, and the TechAssist screenshots provided are TPMS-related rather than LCM circuit verification screenshots. The required green 'Verified' confirmation for all five LCM circuits is not documented photographically.
Repair Summary: Two repairs were made. First, the brake strobe light (RED circuit) was removed and replaced — directly addressing the alerting circuit. Second, the left middle turn signal light (YELLOW circuit) was found to be damaged and corroded, and was also removed and replaced. Both repairs were tested and confirmed operational post-repair. No parts line items were available in the work order to confirm part numbers, brands, or compliance with approved lamp specifications. The corroded valve/grommet component visible in Photos 8 and 9 does not appear to have been formally documented as a separate repair item.
Key Concerns: Several concerns are flagged. (1) The TechAssist screenshots provided are TPMS job completion screens, not LCM lighting circuit verification screens — this is a documentation mismatch that should be clarified with the vendor. (2) No illuminated lamp photos were provided for any of the five circuits, which is a clear gap in the required documentation protocol. (3) The corroded fitting visible in Photos 8 and 9 is concerning — if this is a nosebox or wiring grommet, it could indicate a broader corrosion issue that may have contributed to the LCM fault and may cause repeat alerts. This component should be identified and addressed if not already done. (4) No parts line items are present, making it impossible to verify brand compliance or audit costs. (5) The discovery of a second defect on the YELLOW circuit suggests the trailer may have had deferred maintenance, and a full lighting audit going forward may be warranted.
LCM Current Readings — All Circuits
RED (Brake)
ALERTING
GREEN (Right Turn)
YELLOW (Left Turn)
BROWN (Marker)
BLACK (Clearance / License Plate)
Vendor WO Notes
RO#301912115 Labor Line 1: COMPLAINT - SMART BOX DETECTED SHORT IN LIGHTING SYSTEM CAUSE- UNKNOWN CORRECTION- FIRST I ACTIVATED THE APP AND CONNECTED TO THE TRAILER, NEXT I FOLLOWED THE PROCEDURE AND STARTED WITH THE RED CIRCUIT ONCE ACTIVATED BRAKES LIGHTS ALL WORKED EXCEPT THE STROBE LIGHT, BEFORE PROCEEDING THIS NEEDS TO BE REPLACED AND RE TESTED Labor Line 2: COMPLAINT - SMART BOX DETECTED SHORT IN LIGHTING SYSTEM CAUSE- BRAKE STROBE LIGHT INOP CORRECTION- REMOVED AND REPLACED LIGHT AND TESTED AND NOW THE LIGHT IS WORKING PROPERLY Labor Line 3: COMPLAINT - SMART BOX DETECTED SHORT IN LIGHTING SYSTEM CAUSE- UNKNOWN CORRECTION- NEXT TESTED GREEN CIRCUIT AND EVERYTHING IS WORKING PROPERLY , TESTED THE YELLOW CIRCUIT NEXT AND LEFT MIDDLE TURN SIGNAL LIGHT DAMAGED AND CORRODED NEEDS REMOVED AND REPLACED AND RE TESTED BEFORE MOVING ON Labor Line 4: COMPLAINT - SMART BOX DETECTED SHORT IN LIGHTING SYSTEM CAUSE- LEFT MIDDLE TURN SIGNAL LIGHT DAMAGED AND CORRODED CORRECTION- REMOVED AND REPLACED LIGHT AND TESTED AND NOW THE LIGHT IS WORKING PROPERLY CONTINUE TESTING OTHER LIGHTS Labor Line 5: COMPLAINT - SMART BOX DETECTED SHORT IN LIGHTING SYSTEM CAUSE- UNKNOWN CORRECTION- NEXT TESTED THE BROWN CIRCUIT AND EVERYTHING IS WORKING PROPERLY AND LASTLY TESTED THE BALCK CIRCUIT SND EVERYTHING IS WOROKG PROPERLY UNIT COMPLETED
Defect Photos
Approved by Historical Upload on 2026-04-29T12:52:20.508166