[Jackflash]

I've searched every way I can think of and find info on just about every gauge and sending unit on the coach except the outside air temp gauge above the driver's seat.  The gauge died and upon replacing it the new gauge lights up but displays "000".  I have tried every wiring configuration available since the new gauge had one wire that was color coded differently.  At this point I am assuming it was designed for a different type of sending unit (a new one came with the gauge) but I can't seem to locate the existing one to replace it.  Does anyone have a clue as to where it's mounted?  I've looked in the bay under the driver's seat and under the coach where the six pack is, no luck so far.