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#4785693 - 06/13/18 09:50 AM installing backup camera. Where to ground?
motor_oil_madman Online   content


Registered: 11/29/09
Posts: 4921
Loc: Houston, Texas
I'm tapping the reverse light wire to get 12v power, but also notice their is another wire coming out of the light that is solid black. Can I tap into that wire and use it for a ground?


Edited by motor_oil_madman (06/13/18 09:50 AM)
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#4785717 - 06/13/18 10:16 AM Re: installing backup camera. Where to ground? [Re: motor_oil_madman]
michaelluscher Offline


Registered: 10/07/12
Posts: 2459
Loc: Staten Island, NY
I wouldn't

Use a known good/create your own ground

Don't add another variable to troubleshoot
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#4785766 - 06/13/18 11:10 AM Re: installing backup camera. Where to ground? [Re: motor_oil_madman]
supton Online   content


Registered: 11/09/08
Posts: 12344
Loc: NH
If you don't know where it goes then I wouldn't.
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#4785788 - 06/13/18 11:27 AM Re: installing backup camera. Where to ground? [Re: motor_oil_madman]
ARCOgraphite Online   content


Registered: 05/17/09
Posts: 12133
Loc: N.H, U.S.A.
Body. Scratch off some paint add sheetmetal screw and washer and finish with permatex red. Or alternatively under a screw honding something else down that's through the sheet metal. That's all.

The Body is at GND.


Edited by ARCOgraphite (06/13/18 11:29 AM)
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#4785793 - 06/13/18 11:33 AM Re: installing backup camera. Where to ground? [Re: motor_oil_madman]
WyrTwister Offline


Registered: 01/13/13
Posts: 1752
Loc: Texas
Even better , the frame .
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#4785841 - 06/13/18 12:24 PM Re: installing backup camera. Where to ground? [Re: motor_oil_madman]
JC1 Offline


Registered: 11/29/08
Posts: 3126
Loc: Oshawa, Ontario Canada
I used an existing nut on my caravan hatch for the ground. If one doesn't exist add one that will stay dry.
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#4785865 - 06/13/18 12:46 PM Re: installing backup camera. Where to ground? [Re: motor_oil_madman]
motor_oil_madman Online   content


Registered: 11/29/09
Posts: 4921
Loc: Houston, Texas
How about the bumper behind the license plate?
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2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4785907 - 06/13/18 01:30 PM Re: installing backup camera. Where to ground? [Re: motor_oil_madman]
Johnny2Bad Offline


Registered: 05/20/13
Posts: 2043
Loc: Saskatchewan, Canada
Originally Posted By: motor_oil_madman
How about the bumper behind the license plate?


Might work but often bumpers are isolated from the vehicle ground due to safety provisions (foam, rubber bushings, etc). But there will be a good ground at your license plate lamp.

A good ground is essential in automotive systems. You can always run a wire from your camera to any convenient point that you know is part of the frame or chassis. Remember in a car current flows from negative (ground) to positive, so the ground is a critical part of any electrical connection.
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#4786034 - 06/13/18 04:40 PM Re: installing backup camera. Where to ground? [Re: motor_oil_madman]
dgunay Offline


Registered: 12/05/14
Posts: 624
Loc: Toronto
Originally Posted By: motor_oil_madman
I'm tapping the reverse light wire to get 12v power, but also notice their is another wire coming out of the light that is solid black. Can I tap into that wire and use it for a ground?


Tap that solid black cable to reverse light ground wire. So it only works when you back the car up.
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