Adding a second 0806?

RavenManiac

RavenManiac

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Location
Williamsburg, Virginia
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United States
Dash Cam
Viofo A129 Duo, mini 0806 (RIP)
I'm so happy with my mini 0806 (aside from the audio noise issues, which hopefully will be resolved thanks to PurpleMoon's custom power setup), that I'm thinking about adding a second to my 2012 CR-V's rear window.

I currently have the front dash cam tapped into my CR-V's fuse box using a 5-amp add-a-fuse connected to the rear wiper window fuse, which is 10-amps. If I add a rear view 0806 I'll likely hardwire it to the wiring harness of the rear wiper motor, albeit with it's own secondary 5-amp fuse.

If I do that should I move the front dash cam to another fuse slot? In other words will I be drawing too much amperage off of the rear wiper motor circuit with two mini 0806s?

And second question, I take it a CPL or GPS mount in unnecessary with a rear window mount, correct?
 
At 12 volts, two 0806 will use about 0.5 amps so you can use the same circuit. It would be a little safer to use 1 or 2 amp fuses, 5 amps has a lot more potential to start a fire if the cable insulation gets damaged.

I quite like having the GPS on the back since it makes it a lot easier to find your place within the video. Video without GPS can be like searching for the right place on an old VHS video tape!

The CPL depends on your vehicle but if the glass is at a fairly steep angle like a lot of cars then it will be of little use and even if you have gently sloping glass, there tends not to be much on the parcel shelf to cause bad reflections.
 
Nigel, I'm such an idiot. I'm not going to be able to tap into the rear window wiper motor because the only way that wire will be powered is if the wiper motor is on. Darn. I need to find another source switched of power in the back of my car so I don't have to run a power lead all the way to the front fusebox. Hmmm. What in the rear of the car gets power when the ignition is switched on? Any thoughts?
 
I'd have a look at the electrical schematic of the car. Since it is from 2012 most probably the rear wiper is controlled via LIN (or CAN) so there should be a control unit that will have the power available all the time.
 
That would be awesome if you could find out or point me in the right direction. I've also posted this question on the Honda CR-V Owners forum as well, so maybe somebody there has a wiring schematic.
 
RavenManiac said:
Nigel, I'm such an idiot. I'm not going to be able to tap into the rear window wiper motor because the only way that wire will be powered is if the wiper motor is on. Darn. I need to find another source switched of power in the back of my car so I don't have to run a power lead all the way to the front fusebox. Hmmm. What in the rear of the car gets power when the ignition is switched on? Any thoughts?
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Whatever age the car is, the rear wiper will probably have power all the time so that it can park itself after the switch is turned off. My boot light also has power at all times, it's ground is switched instead of the live. Trailer connections may have power, even if you don't have them fitted the connectors may be there. I just ran a wire from the front interior light where the front camera gets power, just pushed it though above the headlining with a stick, very easy job.
 
Nigel said:
Whatever age the car is, the rear wiper will probably have power all the time so that it can park itself after the switch is turned off.
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It all depends on the wiring, where the fuse box is, where the relay is, how it is controlled etc. The newer the car is, the more ECUs it has (typically).
I guess the owners forum is the best place you can look for the answer. If you have a fuse box somewhere in the trunk all you need is to buy a fuse tap:

3


Then you just locate a fuse for something that turns on with the ignition and plug it in (you also need to pay attention if the power consumption of the 0806 will not cause the fuse to blow).


Still - owners of the CR-V will know best. Whenever someone wants to connect a portable fridge, rear view camera, GPS tracker etc. he will need the same thing - source of power.

EDIT:
I just read your first post again and saw you are already using the fuse tap - I will leave the post for future reference however πŸ™‚
 
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I ended up running a cable all the way to the front in my car. It only took about an hour which is a lot less than I was expecting. Both cameras use the same fuse tap on the heated seat circuit.

I have a CPL on my rear camera as my estate has a roller blind type load cover with a shiny black plastic handle in it that reflects badly in the sloping rear window.
 
Prog said:
I ended up running a cable all the way to the front in my car. It only took about an hour which is a lot less than I was expecting. Both cameras use the same fuse tap on the heated seat circuit.

I have a CPL on my rear camera as my estate has a roller blind type load cover with a shiny black plastic handle in it that reflects badly in the sloping rear window.
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Yep, it looks like I may have to do this too. I take it you just ran the 12V positive lead the length of the car and tapped into the body somewhere for the ground, correct?

Of course, the other option is to simply run a micro USB cable from the USB adapter near the fusebox if one exists that is that long.
 
The more I think about this, is there any reason I can't simply run a 15-20' micro USB cable from the USB adapter near the fusebox to the rear mini 0806?

Here is the specific adapter I'm using. https://www.amazon.com/gp/B00CD0JBZK
The only possible problem is one port is 2.1 amps (used for the front dash cam) and the other is 1 amp, but I think either should be fine for the 0806.
 
Mine uses a usb cable from front interior light to back, they are not fussy about voltage so it doesn't matter if you loose 0.5 volts on the way. At USB voltage they only use about 400 milliamps so you don't need to worry about amps either.
 
Nigel said:
Mine uses a usb cable from front interior light to back, they are not fussy about voltage so it doesn't matter if you loose 0.5 volts on the way. At USB voltage they only use about 400 milliamps so you don't need to worry about amps either.
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Yes, this sounds like the best approach.
 
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