Ok, thanks. I pretty daunted by tearing into the wiring bundle. I don’t mind cutting and butt splicing near the fuse connection but I guess it makes more sense to peel the heatshrink off the suspect O2 wires that I can actually see before trying to find a short in a packed in bundle that would be nearly impossible for me to fix without taking half the firewall apart.

Also, not sure your last paragraph, unpack that for me please?
Sent from my iPad using Tapatalk