does anyone know if the driver side harness has any thing to do with the opti not firing getting heat on everthing that is supose to but still not firing. but I do have a problem with driver side harnness, several wires either burnt or broke do to poor judgement of previous owner. 350 lt1 95 formula. changed om ecu, opti and coil

 

All opti functions are in the engine harness.

Some possible help...

 

so if understand you right the main harness on driver side the one that has the wires for headlights, blinkers and all other stuff, plus fuse and breaker boxalso controls icm, ecm and opti is that correct. I wish I could understand wiring diagram or i wouldnt even have to ask this question