I just finished testing some fuses for the dashcam, and fuses #2 and '#23 look promising.

#2 (10A - Power windows. Electrochromic mirror. Power door locks.) - DEFINITELY Switched. When I turn on the ignition this comes live.
#23 (30A - Amplifier) - This APPEARS to be an always-on 12V positive line to the battery, but can someone confirm that it doesn't shut down after 15-30 minutes or whatnot?

These two would also be the easiest in terms of access, so it would work quite well if so...

EDIT: Correction #23 won't work as it's the wrong way around.... meaning - as fuse taps are directional (you wouldn't want to have your fuses in series!); the wire from the fuse tap gets in the way for tap #23 as the live side is furthest from the plastic "box" that just gets in the way. Darn.

Need some food now, but if anyone has ideas - please send them over!

 

Thanks for the info

 

Ok, ended up using #2 and #23 - turns out the issue wasn't the fusebox space, but the fuse tap being too thick. I also tested #26, which also appears to be always on. All three of these fuses are LIVE on the left and FUSED on the right (just in case someone is using a fuse tap - these are directional).

After some dremel work that a dentist would be proud of to make the fuse tap thinner, it's wired in and working [img]data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7[/img] I also found a fuse tap that works natively (from aliexpress), so only had to modify one of the tw:

The car now has three cameras! Yes, it's overkill but I couldn't make up my mind.

FitCamX - simplest to fit. Front facing only, but also the neatest look. Unless you know it's there, you would never find it. Just need to put a sticker over the SD card so that's hidden too. Also relatively cheap. If it had the LTE features, it would be PERFECT.
BlackVue 750x Plus LTE 2 channel - Front and rear, more features (the remote viewing is quite cool as I can see what's going on in the parking lot, at a garage, etc from my phone).... but also much more obvious.

If there's interest, I can do a writeup (and maybe test all the fuses/directions).

NOTE: this may be of use to people in future:

If you are buying fuse taps for a 2022 mustang, DO NOT get the bottom ones, they don't fit without modification. The top ones fit fine

 

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