Ok, so Im eventually moving in to a new unmolested chassis. Im swapping everything. This will include 4 gauges, line lock, boost controller, haltech, wideband and few other things.
Right now everythings tapped in to anything close it coulds use which has resulted in a giant clutter of ****..
im trying to make everything neat and organized this time.
How do you guys do it? I can add another fuse box for stuff with constant 12v, but what about all the switched 12v sources? If you have any examples they'd be helpfull.
Thanks,
James

 

There are unused switched +12v sources all over the car, it just depends on what options you run.
Examples would be power steering, ABS, AC, AAS...all those are wired into every car and if you don't have 'em, there's an unused plug laying around, probably with a switched 12v.

Use that switched source simply to trigger a relay which will feed power to whatever/wherever you want.
The stock harness can be used- without modification- to do all sorts of useful things.
If you study the FSM wiring diagrams, paying special attention to subsystems you don't have (examples above), you'll find all sorts of useful circuits just sitting there unused.

For example, my efan has a failsafe backup ON/OFF function using the AAS wiring and switch.
No cuts or splices anywhere, looks totally factory.

What you want to do is actually pretty simple.