I am reporting a recurring electrical safety defect in a 2026 Entegra Ethos 20T motorhome built on a RAM ProMaster chassis. Approximately two weeks after purchasing the motorhome new in September 2026, multiple exterior lighting systems began failing, including the brake lights, turn signals, emergency hazard lights, daytime running lights, driving lights, and reverse lights. These failures create a serious danger because other motorists cannot reliably see when the vehicle is braking, turning, or experiencing an...
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emergency. After purchasing the vehicle, I discovered through CARFAX that its computer module had been replaced twice before the sale, on February 25 and August 28, 2026. A RAM service department subsequently informed me that both replacements involved the Body Control Module (BCM). On October 28, 2026, an authorized RAM dealership diagnosed multiple exterior lighting circuit faults and electrical communication-related codes. The dealership recommended another BCM replacement, which would reportedly be the fourth BCM installed in this vehicle. The replacement has not been performed. The dealership advised that the part could take 40 days or longer to arrive. The underlying cause of the repeated failures remains unknown. The lighting failures left the motorhome stranded for weeks. I purchased temporary exterior lights and attached them to the vehicle to travel during daylight hours to a repair facility. The motorhome also experienced interior flooding near electrical wiring due to a loose fitting. Whether this contributed to the electrical failures is unknown. The motorhome remains parked, unrepaired, and unsafe to drive. I request that NHTSA investigate these recurring electrical and exterior lighting failures as a potential vehicle safety defect.