I'm trying to figure out if I can flash my high beams with my headlights off in order to signal a vehicle passing me that it is safe to complete their pass and also to warn oncoming traffic of a hazard ahead. My high beams are only working when my headlights are turned on. The coach is on a Freightliner chassis and when I called Freightliner they weren't sure. If I replace the multifunction switch, which contains turn signals, cruise control, hazard flashers and the high beam switch, it's about $200. If it doesn't work the way that I think it should (being able to flash my high beams with the headlights off) then I just blew the $200. Any ideas or suggestions?