In our SPWM it states all engine wiring with damage must be replaced in it's entirety. I noticed you had 14 FT of cable. I watched the repair of an IDG cable using that hydraulic machine- pretty impressive.
I can relate ARINC to CAN bus networking used in cars. There are two resistors 120 OHMs each, in parallel, in the network, and if one goes bad you will loose the High/Low signals. If you read 120 OHMs on the network, one resistor is bad. This should be similar to ARINC.