Listen to JW, as usual. This was the failure mode for mine, and if its the single wire its needed preventive maintainence anyway. Do the fuel filter, but I'd bet good money its not that. Could be DME relay as well, I'd carry a spare - if you don't carry a spare, buy a new one, replace the existing one, and use the existing one as your spare. Could be any of a number of other things, but those are the usual suspects.
As to blower, sounds like it might be seized, try to run 12v direct to it (brown wire is always ground). If it doesn't run, you can a0 replace fan motor w/ something from Grainger; b) backdate the heat or c) buy the one I have for sale on the used parts board.
