Headlights problems of the 2002 Chevrolet Avalanche

The contact owns a 2002 Chevrolet Avalanche 1500. While operating the vehicle, the low beam headlights suddenly shut off. When the contact tapped the fuse box located under the hood, the headlights turned back on and illuminated normally. The cause of the failure was not diagnosed. The vehicle was not repaired. The manufacturer and local dealer (bob brown Chevrolet in ervingdale, IA) were notified of the failure. The failure mileage was 150,000.

The vehicles headlights are starting to accumulate moisture. Consumer states"once moisture is trap inside, the lights are less noticeable to other drivers and obstructs drivers visibility. " cause is unknown. Please provide any further information. Ph.