OK everyone thanks to yours comment I'm up and running.
I believe the problem has been solved. The snow which accumulated in the engine compartment was building up while driving and when I stopped it melted and fell down on the different electrical connections and caused a temporary short. Thankfully the cable connections to the positive battery posts were the weakest in the system and caused the heat build up and melted the connections. I would have thought a fuse somewhere in the system would have blown but the post acted as the fuse and melted instead.
Luckily my 6v battery had a post which was not affected (the original connections were held in place by a bolt) I installed a new terminal on it and redid all my connections. Everything appears to be back to normal.
Thank you all for your inputs ! :)