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Electrical problems? Stranded!

A number of electrical accessories went out on my 93 R1 at the same time and I can't find the problem. Everything on the "C" circuit of the Joint box diagram that feeds into IG2 of JB-06 is out. I have no power windows, wipers internal fan, starter solenoid etc. I have checked all the fuses and they are fine. I can't find the harness on the car labeled "front harness 'f' ". How do you make sense out of these diagrams! I put my stock ECU back in to see if that was the problem and no change.

Thanks Jim

No electrical experts on the Board? Tomorrow I will have to take it to Mazda, where I'm sure it will come out worse than it goes in!