I've been running mag mount antennas on my pick-up for several years, Wilson 1000's, that I replace periodically as they corrode. A couple of weeks ago, I bought a new Little Will, ( tired of hitting all the low branches in the neighborhood). It never worked right. The SWR's fluctuated randomly. I thought it might be do to all the rain. Saturday, they went really high and stayed that way. Today, I bought another antenna, but it did the same thing. I tried 3 different radio's on both antenna's, with the same result's. I have no idea what to do next. Can anyone help?