To Dave727: What did you do?
What type of FASS pump did you install and where did you install it?
If you installed your FASS pump by your fuel tank then I can't tell you where to find 12V-Switched power, but BigLar368 can. He has a Monaco and installed his FASS TS PUMP up front.
If you decide to install your FASS pump in the engine by, this is where I found a good 12V-Keyswitched source:
First thought I could tap in the the Bus Fuse Box that provides power my marker and tow lights. On my coach (a 2004 Itasca "Horizon" 40AD) this Bus-Box is located in the very last compartment that covers my side radiator. (Same compartment that has my Transmission Computer.) I has s piggyback mini-fuse ready to go and I thought this would be a "homerun." It wasn't.
Turns out that "IGN" fuse in this Bus-Box was "hot" all the time and not key-switched, which is what you need. So what did I do?
Reluctantly, I decided to tap into my 7-pin tow plug located by the license plate. However, with more than 8,000 miles on my FASS pump now I think I can report this is an good source for a switched-12V source; and the wire is 12 gauge too!
The 12V wire in our coach is that "Light-Pink Wire" on the right side of the picture.
Note: We did NOT cut this wire. We stripped a 1/4" of insulation off it and then wrapped the FASS "+" wire around it. Soldered it and tapped it up real good.
How did you install your FASS pump?
Note: We have a Itasce-Fr