I feel for you, that is one really bad design. FWIW it usually involves overloading a circut somewhere with a attached camper, trailer or just about any added on device.
I'm not familiar with the Modulite, but I assume you use it as a added fuse panel thus reliving the TIPM of overloading. A TIPM will reset many times and has a built in number of resets. $900 is just plain crazy but the electronic demands of todays vehicles requires intervention at some point. Again bad design much like a FICM with low voltage from OB. Just a C&P sample off a Dodge Forum.
" This is why i`ve been preachin to all the younger guys, DONT GO BOLTING STUFF ON YOUR VEHICLES ANYMORE, IT`LL COST YOU DEARLY IF YOU DO...!!!!! Say good-bye to aftermarket add-on`s (ie lighting, stereo power amps, on and on...!!!!) If you HAVE to add on accessories, do it the smart way, add/build a fuse box of your own, just off the battery. Dont go pluggin anything into any factory things unless you got $900 bucks you wanna throw away for nothing on a new TIPM, especially if the warranty is up on your vehicle. Trust me, today they know if a module has been over loaded...! "
See he even called you young :B
Let us know how it turns out especially since I own a 06....
Good Luck
Rick