If you can post the first 12 digits of the VIN, we can positively identify it. Don't need the whole thing.

 

I will do so as soon as I get home this evening thanks again

 

3FCNF53S7XJA

 

For what it is worth...you can download the 1999 Ford F53 Owner's Manual here

http://www.fordservicecontent.com/Fo.../99motog4e.pdf

 

Based on the vin #

 

Yes, it is an F53 chassis as denoted by characters 5-7 in the VIN. Ford provided a basic chassis and running gear with very basic accessories to the motor coach builder who then put the whole thing together. Most of the time, the builders leave stuff like the climate control alone so we can look up the diagrams for the F53 and hope they're still accurate.

Here's a link to the factory diagram for the system: https://dl.dropboxusercontent.com/u/..._Schematic.pdf

As you can see, part of the circuit was done by the coach builder, so this isn't complete.