I drive a 1996 Dodge Dakota pickup. When I drive under some very high voltage power lines, which are leaving a power plant, about half the time, they zap my radio. It goes off for about 3 seconds, and then will come back on with just static until I shut the engine off and turn the key back on. It has then erased all my preset stations. The place I cross the lines is about 3/4 mile from the power plant. Any ideas on what causes this, and what I could do to prevent it? Thanks in advance.