LCM Alert Validation

Confidence

Failure Category

Smart 7

Subcategory

damaged connector

Sensor Verdict: The LCM sensor flagged the BLACK circuit (Clearance / License Plate) on trailer WV2502470, and the investigation confirmed a legitimate electrical defect — a loose 7-way receptacle — that was causing intermittent failures across multiple light circuits including the alerting BLACK circuit. Confidence is high (88) that the sensor correctly identified a real fault; the slight reduction from 100% reflects that the root cause was a connector-level issue upstream of the individual circuit rather than a dedicated clearance/license plate lamp failure, making the sensor's specific circuit attribution somewhat indirect but fundamentally correct.

Photo Evidence: The submitted photos provide a reasonable but incomplete picture of the repair. Photos of the Phillips Connect gateway unit (IMG_3988, IMG_3970) show the solar-powered telematics box and the 7-way receptacle area, with IMG_3993 clearly showing the open 7-way socket with visible corrosion/debris on the pins — directly supporting the technician's finding of a faulty connector. IMG_3971 and IMG_3992 show the nosebox wiring, which appears complex and somewhat congested but reportedly verified correct. The TechAssist app screenshots (IMG_3989, IMG_3990, IMG_3991) confirm the system was used and show circuit verification status, including a 'Verified' stamp on the Light Circuit, though the sensor detail screen (IMG_3989) shows 'No data' for all five circuits alongside 'No defects' — which is consistent with post-repair verification when no active fault is present. Multiple amber marker lights are shown illuminated (IMG_3979, IMG_3981, IMG_3982, IMG_3984, IMG_3986, IMG_3926), and red tail/brake lights are shown active (IMG_3983, IMG_3985, IMG_3978). The license plate light is visible and illuminated in IMG_3975. However, a dedicated photo of all five circuits systematically lit and labeled is absent, and the ABS lamp shown illuminated in IMG_3986 warrants a note — the ABS warning light is on, suggesting a possible separate ABS fault not addressed in this WO. The MUTT tester screenshot (IMG_3991) shows 'Left Turn / Right Turn' at 8mA draw, which is within normal range.

Vendor Compliance: The vendor (TA) demonstrated reasonable compliance with the LCM troubleshooting procedure. The Phillips TechAssist app was used and screenshots were uploaded. The technician checked nosebox wiring, tested each light circuit, verified voltages, and ran through all light circuits. The TechAssist app completion screenshot (IMG_3990) shows the Light Circuit as 'Connected' and 'Verified' with a timestamp of 5/20/2026 at 12:56 PM, satisfying the requirement for a green 'Verified' status. However, the five-circuit detail screen (IMG_3989) shows 'No data' for all circuits rather than active current readings, which is a minor documentation gap — ideally captured while lights are energized. The nosebox photos (IMG_3971, IMG_3992) are present but the wiring appears cluttered and it is difficult to definitively confirm clean, correct terminations from the photos alone. The TPMS alert flagged in IMG_3990 ('one or more sensors is reporting a PSI or temperature issue') is unrelated to this WO but should be noted for follow-up.

Repair Summary: The primary repair was the replacement of the 7-way receptacle (part: 16 726 — 7 WAY RECEPT, $35.99) with associated R/R labor (0.5 hr, $121.98). A PCT sensor activation line item was also included (qty 1.0), consistent with re-pairing or activating the Phillips Connect telematics unit after the connector swap. Shop supply fees and lot labor were also billed. The replaced 7-way connector directly addressed the root cause of the BLACK circuit alert — an intermittent connection that would affect clearance and license plate lights among others. The repair appears appropriate and correctly targeted the alerting circuit's upstream cause.

Key Concerns: Several items warrant attention. First, the ABS malfunction indicator lamp is visibly illuminated in IMG_3986, suggesting an active ABS fault on this trailer that was not addressed or documented in this WO — this should be flagged for a separate repair order. Second, the TPMS alert shown in the TechAssist Gateway Details screen (IMG_3990) indicates one or more tire sensors are reporting a PSI or temperature issue, which is also unaddressed. Third, the sensor detail screen showing 'No data' for all five circuits (IMG_3989) is slightly concerning — ideally, the app would show live current readings during verification rather than no data, though the 'Verified' badge on the gateway screen does confirm the system accepted the verification. Fourth, the nosebox wiring (IMG_3971) appears heavily congested with multiple wire colors and connections; while the technician states it was checked and verified correct, the visual complexity makes independent confirmation from photos alone difficult. Overall, the core repair was sound and the LCM alert was legitimately validated, but the open ABS and TPMS issues on this asset should be addressed promptly.