narrowband o2 is 0-1volt.wideband is 0-5volt.4 wire o2 black is signal.tan with white tracer is pcm signal wire @ pcm #3 harness.

 

you should use an 18 gauge line splicer to hook that up (from autozone, they are the weatherproof ones with the grease all over them).

THey worked like a charm for me when installing wires for my wideband to the backlight and power wires.

However, since the wire is pretty thin, I would still take some sleeve off the wire coming from the gauge. Then fill with RTV.

Works well.

 

^ Thanks for the suggestion. I think I'll have to try it, although I must admit, I'm having second thoughts on installing it after seeing some youtube video on narrow band AF meters. They jump around to much to get a reading. I guess I'll just have to find out for myself. You'll know if it didn't work if you see me selling my AF meter in the "parts for sale" section.