So i am looking to soon hardwire a dash cam in.
now the dash cam uses 3 wires.
BATT, ACC/IGN, GND
with a voltage cutout
so when the ACC/IGN trigger is cut the dash cam enters parking mode (uses low power and just comes on when something startles it)
and the voltage cut out will fully cut power and stop parking mode operating when voltage reaches a certain point.

my question is this.
I was going to wire it into a spare fuse slot on my RH engine bay fuse box.
so i will connect the power lead to a spare fuse socket connected to the power bus.
and i will connect the acc/ign lead to a spare fuse socket connected to the IGN switched bus.
so i was wondering does anyone know which empty fuses are connected to which bus?
i am not sure if any empty fuses are connected to ignition bus by defualt and i may need to adjust the wiring at the fuse box.
yes i know i can manually test the fuse box but i thought someone might know.
yes i also know i could just splice the acc/ign wire into an already connected circuit as it only takes a signal and not power but i would like to keep stuff i add on its own circuits.
and could then use this same circuit for any other IGN switched loads.
i feel IGN switch is more appropriate for a dash cam parking mode rather than ACC.
also easier to connect to ign bus as acc bus is all the way in the boot.

 

on all 5 fuse boxes the fuse # 1 - # 9 are hot at all times bypassing inside the fuse box the king relay in the corner , called the ignition positive relay in the right engine bay fuse box

only the fuse 10 , 12 , 14 , 16 relie on the relay to close

so this leaves fuse 11 , 13 , 15 to be hot at all times , which leaves 17 and 18 unknown

there is 2 ribbon connectors on the bottom side and attached to the fuse boxes

since the ignition positive relay is closed by the ignition switch providing a ground path a cleaner installation would be to have a ground seeking relay ( closing control; half of the relay ) under the dash

 

the first detent on the rotation of the ignition switch provides a ground to close the trunk fuse box relay

but i would stay away from the trunk fuse box as you have some battery draining issues going on until resolving

but it does present the possibility to tap power under the dash from the stereo head which comes from the trunk fuse box

ideally the main battery cable terminal post high under the dash ( this woukd be the 2 large B + terminal post on the engine rear firewall ) would be a great power source but is almost impossible to reach high under the dash

Your ignition switch first detent is the trunk fuse box king relay

second detent is the rest of the fuse boxes with the exception of the left engine bay fuse box king relay ( horn )

and the third is the starter enable

 

Easy button is to use the existing accessory power sockets. They are Faston 250 series 3-way connectors in the trunk and (in LHD cars, not sure about RHD) driver kick panel supplying unswitched power, switched, and ground. I use the rear one for my battery maintainer and the front for a dashcam with parking mode. This may not do exactly what you want at each specific key position but is existing, fused, switched wiring.

 

If you look at the fuel pump relay it gets a control ground provided by the ECU with the key in the starter enable position

so this will be shot of 3 seconds as a ground path

the problem is the ground drops out and reappears once the engine is rotating.fFor the duration of your drive using the same exact wire to the ECU

you can use this wire to control a dedicated relay under the dash as the wire transits to the ECU

 

And my hometown team wins ,

 

was a really good close game.
Chiefs did really really well in the 2nd half....

 

will have to look for exactly what connectors you are talking about.
i was just going to run a new power wire as i do like to have my add-ons running their own power source where possible.
but can easily tap into a I or II acc wire at any point as it is just a trigger wire.

 

Red arrow points to the accessory socket to which I have attached my battery maintainer's pigtail. The front one on my LHD car, as I mentioned, is behind the driver kick panel (between the dead pedal and door aperture).

A complete Faston 3-way connector kit looks like this. I think the car side has the plug on the left with the straight spades, so if you don't buy a complete kit, you want the right.