Do have both the cam and crank sensor unplugged and have a continuity reading? Like less than 1 Ohm?
That will kill the PCM.
If that is the case you can do a wiggle test with an ohmeter hooked up, or split the harness open between the 2 and the pcm.Like the area over the exhaust would be a good place for the insulation to be melted.
It is obviously melted to something on another circuit that has a ground path from the harness, IIRC there is a ground at the firewall at the back of the enginetowards the pass side from center.Maybe it is melted there.
The harness will be grounded at a few places seperate from the PCM.Sounds like you do have a short.
Fact is stranger than Fiction