White button in fuse box department? I was switching out a fuse on my 04 discovery and found this button? Any ideas on what it is?

 

not normal. maybe part of an aftermarket alarm system?? ejector seat? Did you press it yet?

 

Trace the wires on it back to work out where they connect. That's going to be the most reliable way to work out its precise function. It looks like there are several splices in there so it could be anything at all.

 

The box to the right of the fusebox is not factory, so I am guessing aftermarket alarm system and a disable button as part of it.

 

I don't even buy vehicles with any aftermarket stereo equipment or alarm to be honest. "If" that was mine I'd start by ripping all that junk out and going back to the stock setup.

 

It’s for nitrous.
But yeah, I’m curious to know WTH is that for.

 

Deffo looks like aftermarket alarm / immobilizer or even remote start / complex tracking device perhaps?

I would say it's not radar / laser, as I've seen most of the installed systems last 10-20 years and none have fuses like that on the main brain. Unless it's super vintage 2000 or so.