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Interior Dashcam finally installed.

Capt. Perfecto

Member
Nthusiast
Oct 8, 2021
57
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18
UK
So, I finally got around to buying and fitting a dashcam in my car. I've owned the car for over a year but I felt the dashcam system I wanted was always overpriced so I was happy to wait for the inevitable reduction. The recent Amazon Prime day saw just such a reduction and the price dropped to something far more agreeable.

I've seen a lot of dashcam installation questions but not much in the way of guides so I thought I'd post my experiences.

This is in no way intended to be a tutorial, this is simply how I tackled the installation. All references are to a UK car, overseas models may differ. Any installation is at your own risk (but its actually quite straightforward).

This is the dashcam I opted for:

IMG20240804113218.jpg

The Viofo A139 Pro 2 channel camera (2 channel just means I get a rear facing camera that records from the back). More info here (no affiliation whatsoever): Viofo 4K A139 Pro 2ch. I also bought the dedicated hardwire kit and a cheapo fuse tap. BTW, for those that don't know, the i20N uses Micro 2 sized fuses.

A quick note about the hardwire kit. There are many kits on the market that would do an equally good job at a lesser price. I have hardwired Viofo cams before on other cars and their kits have a voltage shut off protector built in. They have a voltage selector switch with a range from 11.8V to 12.4V. This means if you enable 'parking mode' on the cam, the cam will switch off if the voltage drops below what you select on the switch. DO NOT set the voltage to less than 12V. If you do this, you risk flattening your battery and not having enough charge to start the car. I always leave mine on the highest setting (12.4V), but the choice is yours. You have been warned. Also, make sure the hardwire kit has 3 cables if you want parking mode to work.

Voltage switch.PNG


Another quick point with the hardwire kit. If you decide to go with an alternative kit, note the orientation of the USB-C (or Micro) plug. Many have a 90° outlet. This is fine depending on your choice of dashcam, but the A139 has the power input on the top of the unit so ideally needs a straight USB-C cable, especially if you want a neat install. If you're not bothered about tidy cables, then the choice is yours but consider the routing and the fact that the cable might have to bend back on itself in order to tuck around the headliner.

This image is the top of the dashcam I bought. You can see why a straight USB-C is preferential, along with the issues a 90° cable might bring:

Capture.PNG

So, to the installation itself.

The camera sits behind the rear view mirror, positioned so the power cable has a straight run between the mirror mount and the rain sensor:

IMG20240804151506.jpg

The only slightly awkward bit was tucking the choke on the USB cable under the headlining. If you look at the image above, you can see a very small bump to the right of where the cable disappears. It is 100% not noticeable when you're sitting in the car. The cover for the rain sensor just pulls off so the cable runs through the headliner, above the wiring for the sensor, then past the next sensor cover (not sure what it is, but that cover unclips easily as well), and goes over to the A pillar. Once you reach the A pillar trim panel you can pull the top of it away so you can route the cable into the weather strip. You'll have to pull the weather strip down to make enough room for the cable to go behind the A pillar trim. The cable then runs down behind the weather strip and into the fuse box behind the panel at the bottom of the drivers footwell:

IMG20240809144003.jpg

Here you can see the weather strip pulled back and the cable disappearing into the fuse box:

IMG20240809144014.jpg

Wiring to the fuse box was very simple.

IMG20240804140907.jpg

There are 2 empty fuse locations on the box. The one circled top left provides constant power, and the top right is powered on ignition or ACC. So, main power is to the ACC (top right) location, if you want parking mode enabled then this is the top left. From memory, power comes in from the left so bear this in mind when you plug in your taps. Power has to come in, flow through the fuse, then go to your camera. This is how it looks after the fuse taps are installed:

IMG20240809143054.jpg

I cable tied the excess and tucked it to the left of the fuse board out of sight. The grounding point I used was a bit of a pain. There is a random nut welded high up to the right of the fuse box. This was the only semi-convenient grounding point I could see. The 2 bolts above are NOT grounded, unfortunately. Unless you have tiny hands, the only way to access this nut is to remove this panel:

IMG20240809143039.jpg

It was a bit reluctant to come off but once removed, you have full access to the nut. Start by prying it off gradually and once you can get a finger underneath it'll pop off. The thread is M6 so I found a nut in my stash to attach the ground:

IMG20240804144542.jpg

Either side of the nut would be OK to attach the ground, I just chose the inside.

I'm limited to 10 photos per post so have not posted anything relating to the rear mounted camera. If anyone would like a similar rambling post on how I installed this then please let me know.

In the meantime, hopefully this might give someone a few pointers. Any questions, please let me know and I'll do my best to answer. I am NOT a qualified installer/auto electrician but this is really not a difficult job to do and is made much simpler by having 2 spare locations on the fuse box. There's always concern over which fuses to tap into so this takes away any guesswork.

Good luck 👍 .
 
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Due to popular demand (well, 2 requests :D), here is how I installed the rear facing camera supplied with the Viofo A139 Pro 2 channel system. Again, I am by no means a professional and this is not a tutorial but simply to show how I went about the task. This is a UK car so overseas models may differ.

To keep the wiring as neat as I could, I positioned the power cable so it had a straight run alongside the rear view mirror. This meant the cable for the rear camera could run the other side, nearer the passenger side:

IMG20240804151513.jpg

The cable slipped quite nicely under the cover for the main sensor housing. This cover had a bit of play so did not need to be removed. The cable exits around the top and easily slips under the headliner. The cable then runs toward the passenger side A pillar. I pulled the weatherstrip down, popped off the top of the A pillar trim cover, slipped the cable under, and ran it under the weatherstrip across the top of the passenger door.

This is a terrible picture of this part of the install:

IMG20240804123150.jpg

I routed the cable along the weatherstrip channel (there is plenty of room), and across the top of the passenger door to the B pillar. From here the cable slips easily into the gap across the top of the B pillar trim. There is an air bag around here so I would NOT advise removing any of the trim panels. You'll have to remove the rear passenger door weatherstrip to feed it through out the other side:

IMG20240804123729.jpg

With the hatch open, and yet more weatherstrip removed, you can feed the cable through. To keep things as neat as I could, I decided to feed the cable through the rubber conduit (?) that carries the cabling for the lights, etc.

IMG20240804124335.jpg

You can see the excess cable at the bottom left of the pic, emerging from the headliner between the weatherstrip.

This next bit was an absolute pig to get right. I wanted to feed the cable through the rubber tubing but access is extremely tight. The A139 Pro camera has very thin cables but even these did not want to fit through. It was not helped by having a 90 degree plug on the end of the cable. The only way I could feed it through was to firstly wrap a tiny bit of insulation tape around the plug (to try and smooth out any areas liable to catch on the corrugations inside the tube). I then fed a cable tie through from the 'wrong' direction, i.e. from the glass side of the hatch toward the parcel shelf. Then I tied a much smaller cable tie around everything, snipped off any rough and sticking out sections, and pulled the whole arrangement back through while massaging and squeezing the rubber until I managed to get it through.

No sniggering please, 😱:

IMG20240804132517.jpg

This is NOT a task I would ever relish doing again.

Anyway, with the cables through and the camera in position on the rear screen, I was hoping to run the cable through the inside of the hatch and out through one of the grommets that cover the fixings for the spoiler. Sadly, this was not possible due to some internal baffles or strengthening sections inside the hatch that meant the plug just would not fit through so I used some small cable clips and surface mounted the cable along the inside of the hatch. Once everything was in place, the excess cable slipped very easily under the headliner out of the way. A quick note on the camera position, make sure you stick it between the wires for the defroster.

So, this is the final result:

IMG20240804140828.jpg

I'm not overly unhappy with how it turned out, I was a bit miffed the cables wouldn't fit through to the grommets as it would have meant less cabling would be visible but I really don't know what else I could have done. From the outside of the car, the camera is 100% invisible due to the window tint but any recordings are very clear (the rear is 1080P).

So, as before, I hope this helps someone out in any small way. If you have any questions or need any other pictures then please get in touch I'll do my best.
 

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Where the wiring passes over the headlining did you wrap it in foam to prevent it rattling? Great write up, it's a shame you couldn't hide the hatch wiring.😥
 
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Where the wiring passes over the headlining did you wrap it in foam to prevent it rattling? Great write up, it's a shame you couldn't hide the hatch wiring.😥
The headliner is quite well padded so I did not feel the need to add any extra, plus once the weatherstrip is reinstalled it pulls the h/l down fairly tightly. All I did was loosely coiled up any excess cabling and tucked it under and there are no rattles or odd noises.

Yes, I agree re. the cables but they're really only visible when the hatch is open, as per the photo in the thread.
 
Thanks for posting your camera install, it's a fiddly job and I'm half way through it myself. I absolutely appreciate the choice you made to put the camera on top of the window. I've been messing around for the past two hours trying to get a guide line to feed down the wiring loom so I can mount the camera on the bottom of the window next to the wiper housing. I have not been successful, its a real horse's arse.

Front camera's mounted and working fine though. Parking mode wouldn't work at first, and thinking it through I figured it was one of three things, a bad fuse tap, poor battery health or a faulty camera unit. Turns out it was the battery and a trickle charge fixed it up - for now.

I'll persevere for a bit longer to see if I can make the cable feed down the the wiring loom for the lights as I really want it mounted low where I won't really notice it in the mirror. If I can't do it, I'll copy what you've done as you've shown it works.
 
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Good luck, its an absolute pig of a job. The camera system I have has quite small cables, certainly thinner than a standard USB cable so that helped although it wasn't so much the cable I had trouble with but the plug on the end.

I gently pulled the concertinaed sections of the rubber cover as straight as possible and massaged the cable through while I pulled from the other side and eventually got there.

Be interesting to see how it looks mounted at the base of the window, TBH I didn't even consider mounting it there 👍 .
 
I finally managed to feed the cable into the hatch door and finished the job yesterday. Sorry I've been a bit slow to post about it, I've also had the pleasure of COVID keeping me company.

So although a similar job to the great walk-through provided by @Capt. Perfecto, there were some differences in my install due to the dash cam model I chose. In hindsight I think Perfecto's choice is much more suited to the car but I was looking for 4k front and back. I chose the VIOFO A229 Plus duo.

Model.jpeg

I opted for the polarizing lens and the other box under the horrible glare is just a fuse tap (x2). As posted earlier, I wanted to mount my rear camera at the base of the window. This sounded like a great idea to me and would be piece of cake to achieve ... right?

Holy guacamole Nope! Feeding a fat USB C right angle connector was never gonna happen. Except it did.. with some encouragement! I started with feeding the cable up through the hatch rear panel and through the grommet.

Cable feed hatch.jpeg
Cable through grommet.jpeg
BUT!! and there's always one isn't there. The right-angle connector was never going to feed, its just too big. So I changed it.
Something seems wrong.jpeg

With the offending connector removed, I was able to feed the cable through the hatch door (it runs up a channel beside the window). I need to use a guide wire which I made from some old leftover curtain wire. All in all, very basic tools were required.
Tools.jpeg

Once the USB C cable was fed through the grommet and into the cabin, it was time to reconnect the right-angle connector.
Back to tech.jpeg
This was a bit fiddly and challenging for a numpty like me but very basic soldering skill was all that was needed. A USB C cable has 7 smaller wires and a bunch of shielding in the sheathing. Using flux, some 60/40 0.7mm solder and a soldering iron that is 35 years old, I tinned each wire after stripping it back about 10mm. Forgive me but I didn't take a photo of the cable once taped up, it was backyard mechanics job and didn't look too pro, but its functional.

The end result was:

Front camera pos.jpeg
Front camera position and cabling.

Rear camera pos.jpeg
Rear camera position and cable.

View from drivers.jpeg
Can't really see it from drivers seat. Just a hint of cable in the rear vision mirror as the middle seat headrest blocks view of the camera itself.

Hidden camera.jpeg
You can't see the camera from the outside which is cool.

Well that's how my installation turned out, I thought I'd post it in case anyone finds it helpful in any way.
 
Thanks for these with the pics. I'm arranging to get a dashcam for my i20N, but its a bit of a chonker, so I was wondering about installing it off center in the front, on the passenger side of the driver assist cam.

I was also wondering about whether the rear could mount to the painted edge in the top of the rear hatch, rather than the glass. Well top center is probably second choice if i can't get it on the plastic down beside the wiper.
 
Im looking at fitting a second camera for the rear, happy with my minimalist front setup but it doesnt allow for a secondary smaller cam so im just thinking about buying another cam, any of you had any issues with the camera fitted to the boot (trunk/tailgate) my worry is the force of closing might make the camera fall off.
My plan for power is to use the usb socket in the rear on the centre console and routing under the seat to the b pillar into the roof lining and affixing in a similar place to @Capt. Perfecto so im also wondering what it looks like from inside with the position of your cam and have you had any issues with the small gap left in the boot gromit with the cable coming out?
 
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Im looking at fitting a second camera for the rear, happy with my minimalist front setup but it doesnt allow for a secondary smaller cam so im just thinking about buying another cam, any of you had any issues with the camera fitted to the boot (trunk/tailgate) my worry is the force of closing might make the camera fall off.
My plan for power is to use the usb socket in the rear on the centre console and routing under the seat to the b pillar into the roof lining and affixing in a similar place to @Capt. Perfecto so im also wondering what it looks like from inside with the position of your cam and have you had any issues with the small gap left in the boot gromit with the cable coming out?
Hi Spliner,

Re. the camera fixing, I have not had any worries that it will come loose or fall off. It is held on with 3M tape and its pretty sturdy stuff. Just make sure you clean and degrease the glass thoroughly before you stick it on and you'll have no problems. As always, prep is key 👍.

I've just taken a pic of the grommet. You can see a very small bulge, which is obviously hidden when the hatch is closed. The grommet is still seated very securely so if you're concerned about water ingress then I really wouldn't be. Its still a very tight seal.

I've also taken a quick pic from the rear view mirror so you can see how it looks from inside the car. Once you are sitting properly in the drivers seat, the slight slope on the roofline make its hardly visible. Bizarrely, the thing that bugs me the most is the cable clip you can just see to the left of the camera. A reposition job for the Christmas break, I think :D.

Hope this helps, feel free if you have any more questions. I'm not on here as often as I'd like but I'll try to reply as soon as I can 👍.

IMG20241212125702.jpg

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Thanks for the extra pics, I realise how I've got my rear view mirror positioned that I rarely see the top where the cam would be so not too worried. I'm thinking about seeing if the groin you've used actually leads to the gromit for one of the spoiler gromit (i plan on investing tomorrow) then use that. The cable I've ordered is very thin which should also help.

I'll update with findings and when I've fit my cam when all the bits arrive in a few weeks
 
I also considered using one of the spoiler grommets initially, but there are strengthening baffles in that part of the hatch so there was no way I could feed the connection for the camera through. I could feed a cable tie through so there's definitely an open pathway, maybe if your cable (and, more importantly the connector) is super thin you may have more luck. A real pity as I think it would have been a lot easier than the cable grommet route.