am radio static when headlights on

I have a new F250 Diesel w/single cd radio.  When I turn on the parking or headlights, I get a lot of static noise on am.  I do know that others with same truck are having this problem.  Figured you folks could steer me to some kind of filter to correct this?  Being a diesel, I know resistor spark plugs sure aren't going to help!   Going on a cross-country trip next week and would sure like the am radio at night!  Thanks guys.....

My F350 diesel (2001with factory radio) has not had this problem, nor have I seen it. We do a lot of work on the Ford Trucks and have not seen it in any of them. The first thing I would try is replacing the factory radio with another, an easy task at the dealer as warranty would take care of it. Hopefully the problem will disappear.I have seen 1 major flaw in a Ford vehicle and it resulted in 6 blown amplifiers before I convinced and showed Ford this problem. The problem was traced to a bad vehicle ground on the firewall from the battery. This was not in a F250 but in a 2001 Ranger. If the problem still exists with a different factory radio, I would look more closely at the routing of the antenna cable, next a possible break in the antenna wire (you may not be able to see this) and finally the grounding and power connection of the radio and their proximity to the antenna. You may have a relay that is putting out all sorts of noise into the power system of the vehicle. This relay is energized when you turn on the parklights / headlights. The radio may be drawing power from a point on the same circuit. Good luck.Top Secret, I can tell you but then my wife will kill me.