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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 09-13-2015, 05:30 PM
carls540i carls540i is offline
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Location: atlanta
 
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Mein Auto: BMW 540i
reverse camera

Installing a reverse camera in my 02 540i and wiring it to the license plate light which has 2wires,one Brown with a black stipe and the othr gray with black stripe.which one is the power wire? The camera has standard red power wire and black ground. Thanks
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  #2  
Old 09-13-2015, 05:54 PM
Alika808 Alika808 is offline
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Mein Auto: X5/525/325
Usually brown wire is the ground wire, but to be certain use a voltmeter to verify.
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Old 09-13-2015, 05:57 PM
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eburnz eburnz is offline
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Use the grey and black stripe wire for power.
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Old 09-13-2015, 09:02 PM
sealbeach740 sealbeach740 is offline
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Are you saying you want to wire a backup camera to the license plate light?
Wouldn't this imply that you could only use the backup camera when your lights are on?
Doesn't sound like the right way to go.
While the brown (ground) wire is fine to tap into, I think you should be looking for a switched power wire that's hot when the key is in position 1 or 2 or higher, depending on your preference.
I wired mine to a position 1 switched wire so I can have the camera on with the key in position 1. My preference.
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2000 740iS. MKIV, 16x9, DDEs controlled by Euro fog light switch, reversed steptronic +/- pattern, paddle shifters, clear corners, Basslink, iPod video with stereo audio, TV tuner, gauge rings, ///M pedals, backup camera with 'on demand' switch, quad brake lights, Dinan engine & tranny software, windows/sunroof close via remote.

2003 540iS. MKIV, 16x9, PDC, CWP, TV tuner, backup camera with 'on demand' switch, paddle shifters, windows/sunroof close via remote, iPod video & audio.
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Old 09-13-2015, 11:28 PM
E39Hoon E39Hoon is offline
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Brown is ground and the other is power. As sealbeach stated, you should get power elsewhere or else your lights would have to be on for it to work. I tapped into one of the reverse lights for mine.
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Old 09-14-2015, 05:18 AM
carls540i carls540i is offline
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Reverse Camera

Thanks all for the replies. Installing an aftermarket radio with backup camera feature so the camera will only power on once the car is shifted into reverse. I'll need to connect the other side of the cameras power wire to the green/black reverse light wire to trigger.

thx
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