Love my van !

I bought my vivaro van 19tdi from new on a o6 plate, its been a hard working tool from day 1
I have not had any probs with it up to now, I have it serviced once a year by the main dealers ( silly me ) but i do need this van to be in tip top condition for my work, however :-
just before xmas my indicators packed up, I spoke to a friend of mine who knows abit about cars and he said tap the hazard warning light switch a few times !! so I did and HAPPY DAYS they came back on, no more said untill 1 evening my neighbour called saying my alarm on my van was making funny noises so I ran out to see what was happening, I open the van and there was black smoke belowing out of the cab,it took me 10 mins to disconect the battery before the van was likely to go up in flames !!
Now with some invetigation i have learned it is the control modual that does the centrol locking and windscreen wipers and indicators,
I have yet to get this fixed and I can only think that this is going to be expensive as i think it has melted the wiring as well.
I cant drive it to a garage so i need to find a mobile auto-electrician.
My van has done nearly 80,000 miles and with this problem arising I would still go out and buy another 1 tomorrow.
Has any 1 had this problem b4 ??
If so how much did it cost to repair ??
Feed back would be appreciated
Thanks
Steve