I wish I could help out with an answer, unfortunately I cannot but I am experiencing the same problem. I blew up my engine and had a local shop take a month to put in a new used engine. he pointed out my wiring harness was burned out, I am assuming from the looks of it, it was not burned and is just brittle insulation on the wires as described, he wrapped the wires for me, but with this other engine in I am also getting a battery light every time I turn the car off. This leads me to believe that my two problems are connected. unless there is any difference in the wiring harness from a b21ft and whatever engine I have now (I really have no idea what was put in It's either a 230 or something else, If anybody has a good way to tell I would b thankful)

I hope this helps somebody that is a little more familiar with this model, keep us updated.

Tom LeRoy