Today my 2002 xterra (not supercharged) was running rough and the check engine light came on. I realized a spark plug wire was split in 2 pieces and while replacing the wires I found these wires that were exposed. This is right where the wire was split so I figured it is the culprit of the spark plug wire. My question is what do the wires operate? Should I be worried about this enough to replace it? I dont want the wires to short out and fry the computer, which I had happen in a jeep a few years ago. Any help will be greatly appreciated.

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