LCM Alert Validation

Confidence

Failure Category

Smart 7

Subcategory

damaged connector

Sensor Verdict: The LCM sensor alert on the BLACK circuit (Clearance / License Plate) is assessed as 'Defect Detected' with 82% confidence. The primary evidence supporting the alert is the discovery of a cracked 7-way receptacle with a broken bolt in the lid — a physical connector failure that would directly compromise power to the clearance and license plate circuit. A secondary finding of a dim left rear clearance/marker light further corroborates that an actual lighting defect existed on this trailer at the time of the alert. The slight confidence deduction reflects that the technician's notes do not explicitly tie the connector failure to the BLACK circuit specifically, and the app screenshot (Photo 16/IMG_3967) shows 'No data' across all circuits, meaning live fault data was not captured during active fault conditions.

Photo Evidence: The photo set is reasonably comprehensive. Photos 1, 4, 7, 12, and 17 (IMG_3955, IMG_3956, IMG_3953, IMG_3959) show amber/orange midturn clearance marker lights illuminated along the trailer sides — consistent with the clearance circuit being energized. Photos 20, 22, 23, and 24 (IMG_3958, IMG_3951, IMG_3952, IMG_3966) show rear red brake/stop/turn lights illuminated at the tail end of the trailer. Photo 21 (IMG_3954) shows a small red clearance light at the trailer corner. Photo 11 (IMG_3960) shows the front ABS corner area with an amber light and a red indicator lit. Photos 18 and 6 (IMG_3946, IMG_3963) show the nosebox — the interior wiring photo (IMG_3946) clearly reveals significant corrosion on the terminal studs inside the junction box, which is a notable secondary finding. The 7-way connector photos (IMG_3944, IMG_3945) show the open receptacle with bent/damaged pins on one version and a cleaner view on the other, consistent with the replacement described. Photo 5 (IMG_3950) shows a broken bolt/nut near the license plate bracket. App screenshots (IMG_3967, IMG_3968) are present: IMG_3967 shows all five light circuits verified (Red, Green, Yellow, Brown, Black), and IMG_3968 shows the Gateway Details with a CargoV sensor 'Not Connected/Unverified,' DoorV 'Connected/Test to Verify,' LightCircuitV 'Connected/Verified,' and TPMSV with a PSI/temperature warning. Notably, the LightCircuit app screen shows 'no fault status data available,' which may indicate the fault was resolved before final app capture. Photos of all individual clearance lights along the full trailer length are not fully documented — some positions appear uncaptured.

Vendor Compliance: The vendor (TA) followed the LCM troubleshooting procedure to a satisfactory level. The TechAssist app was used, and a completion screenshot showing all five circuits verified with green 'Verified' status was provided (IMG_3967). The technician photographed multiple lights illuminated across the trailer. A nosebox interior photo was provided, though it reveals concerning corrosion on the terminal block that was not explicitly called out in the repair notes. The technician referenced the Phillips app specifically and uploaded required photos, demonstrating awareness of the LCM protocol. However, the feedback language in the notes does not map cleanly to the required category list (e.g., 'damaged connector' and 'light dim' are the closest matches), and the TPMS warning visible in the gateway app screenshot was not addressed or flagged in the repair notes.

Repair Summary: Two primary repairs were made: (1) R/R of the 7-way receptacle — a cracked housing with a broken bolt was replaced with a new unit (part: 16 726, 7-way receptacle, $35.99); and (2) R/R of one marker/clearance light — a dim left rear top light was replaced with a Mini LED Red Marker (part: 33250R, $23.99) along with a grommet (33700, $5.99). A TPMS sensor activation was also performed as a separate line item. The 7-way replacement directly addresses the BLACK circuit fault, as the clearance and license plate lights are powered through this connector. Labor was billed appropriately across two lighting line items. The LED marker replacement is compliant with standard practice. Total repair scope appears reasonable and proportional to the faults found.

Key Concerns: Several items warrant attention. First, the nosebox interior photo (IMG_3946) reveals heavy corrosion on the terminal studs — this was not mentioned in the technician's notes and was not repaired. Corrosion at this level can cause intermittent voltage drops and future LCM alerts, and it should have been flagged and addressed. Second, the Gateway app screenshot (IMG_3968) shows a TPMS PSI/temperature warning on one or more sensors — this was billed as a sensor activation line item but not elaborated upon in the notes, and it remains in 'Test to Verify' status, suggesting it may not have been fully resolved. Third, the LightCircuit app shows 'no fault status data available for the circuits,' which while not alarming post-repair, means there is no captured pre-repair fault data to confirm the exact circuit that was faulted. Fourth, the CargoV sensor is shown as 'Not Connected/Unverified' in the gateway screenshot, which may indicate a separate sensor issue not addressed in this work order. Overall, the core defect was found and repaired correctly, but the corrosion in the nosebox is a deferred maintenance concern that should be flagged for follow-up.