1989 International S1600 Alternator circuit

kurtk87

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The truck is an ex U-haul truck. I was installing a newer radio in it when I found out the radio will not turn off with the key along with some other things connected to that circuit. I have a factory electrical diagram and just did some tracing and unplugging things to find out what circuit is back feeding power to the acc. circuit. I have found out that if I unplug the connector at number 1 and 2 at the alt. the power drops and acc. power turns on and off with the key again. The manual also says that circuit CSI is a resistance circuit do not alter. I haven't found if it was altered yet, but does anyone know if thats the purpose of that resistance wire? to keep it from back feeding? I'm gonna try to attach pics shortly.
 

kurtk87

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Here's some pics of the circuit in the manual and the actual plug on the alt. I would also like to note that I have unplugged the ignition switch and even then acc. Power is still on at the radio and other places like original cb adapter etc.
 

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