There are many unused fuses populated in my 2010 Ford Fusion's interior fuse box. I've tested with a voltmeter and the fuse I have in mind turns on and off with the ignition, which is what I want. Now, I need to find the output wire hooked up to this specific unused fuse.
How can I figure out which wire I want to tap into without completely destroying my wiring harness? (If it matters, it's fuse #34.)
I know I can also accomplish what I want via a fuse tap also, I just thought that if there is a wiring harness existing, it would be awesome to just use that. And a tap would make it hard to fit the cover back on the top of the fuse box.