Fusable link questions

thanks for the input i will check out these suggestions.1 problem i found out the hard way was the blue wire on the alt. harness on.pass.side of car fried any idea what this blue wire is?Choke for carb? Fans are wired direct to the battery with large fuse.no radio column connector had a melting spot on large red wire ireplaced it.
use the link for the service manual and trace it out. learning how chrysler wiring diagrams work will save you MUCH grief in later life