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I am a Firefighter in Missouri and have a 2007 F-450 ambulance in my station. This morning the passenger side low-beam headlamp stopped working. By noon the driver side also stopped. The bulbs were replaced with no change. The fuses all seem to be okay. The high-beams work just fine, and will wig-wag when turned on. I called the ambulance body builder and got no help, with them saying it is a ford problem. Does anyone on here have any suggestions? I would like to be able to put this ambulance back in service today, and not have to be in an old International.
I did some more thinking about it and wonder if the wig-wags may have caused a wiring failure similiar to the ones I read about the people using the HID headlamps. I saw several posts about folks who did not upgrade the wiring and it caught up to them. The ambulance has been in service 3 months now, and I wonder if the pulseing wig-wag on top of the low beam lamp, would cause the same type failure?
Found the problem. It is only on the ambulance package and it's a computer problem. See TSB 07-16-6 involving the smart junction box or generic electronic module.