Dashcam hardwire kit, which fuse did you tap for the ACC and Power wire?

[Arese]

Hey everyone,

Picking up my B8.5 S5 next Thursday and I'm planning to install my Viofo A129 Pro right away (currently hardwired in my A4)

For those who have hardwired a 3 wire hardware kit to their S5, you must know that a 3 wire kit requires connecting a red wire to a fuse that provides constant power (even when engine turned off), and then we also need to connect the yellow wire (ACC) to a fuse that is not powered with ignition off. (this is what trigger the dahcam to switch automatically to parking mode)

On my current A4, I tapped the cigarette lighter fuse for the ACC wire as it's not powered with the ignition off.

However, I checked online the fuse diagram of the S5 and it seems like the cigarette lighter fuse is in the fuse box located in the trunk. The hardwire kit wires aren't long enough to go all the way to the trunk so that means that I will have to find another fuse to tap located in the instrument panel (driver side I guess)

I'm equipped with a multimeter and I can test each fuse to identify an ACC and power fuses to tap but I thought I'd ask the community in case some of you already went through the process.

Thanks

[NPuter]

In the front box, the mini fuses are switched/accessory power and the full size fuses are constant power. I think there may be a few full size fuses in the bank with the mini fuses that may be switched as well.
I just picked a random mini fuse for the acc tap and a large fuse for the battery tap (double checking the diagram to make sure I wasn't messing with something important).

[dbtong]

This thread has a little info. https://www.audizine.com/forum/showt...se-to-hardwire

[Arese]

In the front box, the mini fuses are switched/accessory power and the full size fuses are constant power. I think there may be a few full size fuses in the bank with the mini fuses that may be switched as well.
I just picked a random mini fuse for the acc tap and a large fuse for the battery tap (double checking the diagram to make sure I wasn't messing with something important).

Wow, if the full size fuses are all constant power and the mini fuses are all switched fuses, that would be too easy! On my A4 it was totally random so I had to test them one by one with a multimeter.
Ok well, when I get the car I'll confirm what you said with a multimeter. Should be easy.

I will report back and provide the fuse slots I used for anyone who might come across this post in the future.

Thanks

This thread has a little info. https://www.audizine.com/forum/showt...se-to-hardwire

Thanks but I advise you don't link to that link to anyone else.
People on the thread you linked to have no clear clue what they're talking about. And one of them is linking to another thread filled with incorrect information https://www.audizine.com/forum/showt...on-Please-help
On this thread, someone keeps saying the yellow wire should be connected to a fuse with constant power which is totally wrong.
Someone who's looking to hardwire a dashcam for the first time would get really confused at best or would install their dashcam the wrong way in the worst-case scenario.

[usmcfieldmp]

...another thread filled with incorrect information...

Welcome to online forums. You will always have to sift through what is true/significant, and what is not.

I sifted through the BS and installed mine without a hitch - and I don't know that the information is necessarily wrong, but there are differences between B8 and B8.5 - the theory remains the same.

As mentioned in here and in the linked thread, of the three fuse boxes in that driver's side panel, there is (at least) one for constant power and (at least) one for ACC power. The empty fuse slots in my B8.5 S5 were wired, so all that needed to be done was to slip the dashcam fuse-plug in. I have a Rexing camera and they sell power cords that have fuse-ends, so no need to actually splice, cut, or anything like that.

https://smile.amazon.com/gp/product/B01LXC2329/

[dbtong]

Wow, if the full size fuses are all constant power and the mini fuses are all switched fuses, that would be too easy! On my A4 it was totally random so I had to test them one by one with a multimeter.
Ok well, when I get the car I'll confirm what you said with a multimeter. Should be easy.

I will report back and provide the fuse slots I used for anyone who might come across this post in the future.

Thanks




Thanks but I advise you don't link to that link to anyone else.
People on the thread you linked to have no clear clue what they're talking about. And one of them is linking to another thread filled with incorrect information https://www.audizine.com/forum/showt...on-Please-help
On this thread, someone keeps saying the yellow wire should be connected to a fuse with constant power which is totally wrong.
Someone who's looking to hardwire a dashcam for the first time would get really confused at best or would install their dashcam the wrong way in the worst-case scenario.

Sorry, didn't QC the info there. Just recalled that there was a recent post/thread and wanted to point it out. Good luck!

[Arese]

Welcome to online forums. You will always have to sift through what is true/significant, and what is not.

I sifted through the BS and installed mine without a hitch - and I don't know that the information is necessarily wrong, but there are differences between B8 and B8.5 - the theory remains the same.

As mentioned in here and in the linked thread, of the three fuse boxes in that driver's side panel, there is (at least) one for constant power and (at least) one for ACC power. The empty fuse slots in my B8.5 S5 were wired, so all that needed to be done was to slip the dashcam fuse-plug in. I have a Rexing camera and they sell power cords that have fuse-ends, so no need to actually splice, cut, or anything like that.

https://smile.amazon.com/gp/product/B01LXC2329/

Thanks for your reply. Ok gotcha, out of the 3 fuse rows, one is constant and the other is ACC.

I just had 2 questions. Got my S5 today and had a look at the driver's side fuse panel.

How do you open/remove the purple plastic thing against the fuse, when I tried to pull the purple plastic the whole row of fuses were jiggling so I didn't want to force and break something.



On the plastic panel, there was no diagram in reference to what each fuse slot pertains to. Where can I find that diagram to make sure I don't mess with a fuse slot that pertains to something important




Thank you

[NPuter]

Those purple shields easily unclip. Just hold the box in while pulling the shield to unclip it.

I believe there should've been a paper diagram attached the the inside of.thr fuse box cover.

But, you don't have to place your add a fuse in an already occupied slot - most of those empty slots are still powered, so you can use those.

Here's how I had my a4 wired using what were empty slots



Sent from my Pixel 5 using Tapatalk

[usmcfieldmp]

What he said.

The purple things have clips on the end - if I remember, I'll take a picture of mine when I get home in a couple hours so you can see. I'm pretty sure I just used a pick/hook tool to unclip the ends.

And like I said earlier and he just reiterated... a lot of the empty slots are pre-wired for this kind of add-on. Pick one that doesn't have anything in it and add your camera's power to it. Pretty sure that I added mine to the middle panel, but I don't have access to my car right now to be able to confirm.

[Arese]

Really good points regarding the empty fuses.
On my A4 I had to tap on existing fuses and had to make sure to check what the fuse was used for so I was set in my head on doing the same, thanks for pointing it out, appreciate it.

Though it would still be useful to know where I can find the fuse diagram should one day an electrical issue occurs.

On my A4 on the back of the plastic cover, I had this. Can you guys confirm there should have been a paper diagram on the S5 as well just like the below picture?



Appreciate your help guys, going to work on it this afternoon, now that I know that I need to unclip the purple things, should be alright.

[Arese]

All done.
Dashcam hardwired, switch to parking and driving mode as intended.

Ran the wire from the dashcam along the windshield then ran the wire to the outer side of the door jam hidden under the rubber thing (orange line)

For people who will come across this post.

Do not connect the black wire to the bolts indicated by a red arrow, they are not metal ground bolts as they are against the plastic dashboard and not in direct contact with the metal frame.
Use the 2 other larger bolts instead, I used the one indicated by a green arrow.

The middle row of fuses are constant power (red wire - standard fuse)

And rightmost fuse row are switched fuses (yellow wire, mini fuse)



Thanks for everyone's help!