Fusible Link Fried!

Mattax said
With respect to the fusible link -
The key switch connects only two circuits in Start;
The Wire which close the starter relay, usually labled S and yellow insulated.
Ignition start, which powers the coil. (Usually brown insulated up to the ballast resistor)

Can't offer more detail than that without the usual
Model:
Year:
Transmission:
Ignition, Stock or what?
Alternator and VR, stock or ?
Any other modifications to the electrical system from stock.
Click to expand...

1972 Dart Swinger, 904 transmission, FBO converted ignition, alt and VR stock. Ammeter bypassed, voltage meter installed.
I have tried disconnecting both of those circuits and have drilled out the connector and soldered in a new wire where the fusable link was while trying to find the source of the short. Everything works fine till I actually try and start the car.