Outer Limits 4x4 Board

well after a long weekend of trying to get home i have some problems

i have a hj60 4L diesel
one of the wires going to the positive terminal of the batt got so red hot it melted it self together and snapped
after a quick fix i managed to get her started again but it wasnt charging at all,
now this morning iv noticed when i turn the ignition on to heat the glow plugs, the glow plug go straight off like the the ligh flash on and off and you can hear the click click under the hood

dose this mean i have screwed the alternator and some? and if so what else have it stuffed?

most likly done the diodes in the alternator

problem is my glow plgs dont stay on either have to turn the key on and off a few times before the light stays on the full 10-20 seconds