I was alarmed to hear arcing while the coffee maker was turned on. With it disassembled, I could see arcing at the discolored and charred spade connector that is disconnected in the image above. The short wire connected to it also feels stiff and crunchy. Tightening the connector stopped the arcing at that terminal, but it sound like there might now be arcing inside the wire. I'm guessing the wire is damaged.
Can this be safely repaired, considering it's a relatively high current appliance?
Note that I previously repaired this coffee maker by replacing one of the thermal fuses which had blown. That's why parts of one of the braided insulation wires look a bit frayed, since I had to move the insulating sleeve over to one side, replace the thermal fuse, then slide it back.
While repairing, I had also noticed the browning of some plastics and wires near the power switch. The two brown wires from the mains were hardened near the spade connectors. I cut and re-terminated one (bottom) that was more brittle, which now has a red insulation segment, though part of it is discolored browned now. I would not expect that area to heat up much, so I wonder if there's a problem that needs to be identified for this to be safe.
I realize it's an inexpensive decades-old machine, but if practical I'd like to repair it, both because I hate waste, and because it makes better coffee than newer and more expensive units.