I had a similar problem I thought it was the individual switches but I replaced the Master Switch($39 bucks off Ebay free Post) hope this helps and I haven't had an issue since Cheers Tim
I had a similar issue with my blower motor and found it easy to access by removing the glovebox to get better access to the screw's mine is an '08 check to see if it still runs on setting number 4 if it does that points more to the resistor if it doesn't work on any settings it's more than...
If it went bang as you have said I'd be inclined to agree with
tweak'e and Scuba Steve and check under the rocker cover to see if anything is still spinning if it's not you more than likely have a busted timing chain
G'Day I'm Tim from Old Beach,Tasmania :tazzy: I'm new to Navara's so i'll be asking plenty of question i hope i don't wear out my welcome though LOL:rofl2: