Ground wire for backup camera on E93

osunick · 10-03-2019, 01:34 PM

Hi all,

I have a trunk backup camera and I need a ground. I am looking at this harness that plugs into the RR backup light.

On the left is the harness side, and the right is the connector to the light. Typically I'd say brown is the ground but the two browns don't connect. My gut says center wire is ground, but thought someone could help me out. Thanks!

eugenecp · 10-03-2019, 03:31 PM

This video might help

Canuck335 · 10-03-2019, 04:51 PM

Don't guess!!
1. Use newtis to check your car's exact wiring diagram.
eg. here's the link for a e93 335i
https://www.newtis.info/tisv2/a/en/e...-light/lynjIv0

2. Confirm with a multimeter that the pin you think is ground, is actually ground.

osunick · 10-03-2019, 09:53 PM

Quote:

Originally Posted by Canuck335

Don't guess!!
1. Use newtis to check your car's exact wiring diagram.
eg. here's the link for a e93 335i
https://www.newtis.info/tisv2/a/en/e...-light/lynjIv0

2. Confirm with a multimeter that the pin you think is ground, is actually ground.

I think I'm reading this wrong, none of these colors match what I see in the pic: https://www.newtis.info/tisv2/a/en/e...lights/apJiaOH

osunick · 10-04-2019, 02:06 PM

Figured it out, thanks!

eugenecp · 10-06-2019, 08:57 PM

Quote:

Originally Posted by osunick

Figured it out, thanks!

Which one was it?

10-03-2019, 01:34 PM	#1
osunick Private 4 Rep 51 Posts Drives: 2002 Honda S2000 w/oem hardtop Join Date: Apr 2010 Location: Palo Alto, CA iTrader: (0)	Ground wire for backup camera on E93 Hi all, I have a trunk backup camera and I need a ground. I am looking at this harness that plugs into the RR backup light. On the left is the harness side, and the right is the connector to the light. Typically I'd say brown is the ground but the two browns don't connect. My gut says center wire is ground, but thought someone could help me out. Thanks!
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10-03-2019, 03:31 PM	#2
eugenecp Private 19 Rep 77 Posts Drives: 2009 BMW 328i Convertible Join Date: Aug 2019 Location: TX iTrader: (0) Garage List 2007 Toyota Sienna [0.00] 2004 VW Touareg V8 [0.00]	This video might help
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10-03-2019, 04:51 PM	#3
Canuck335 Private First Class 151 Rep 185 Posts Drives: 2011 335ix Sedan 6MT Join Date: Aug 2019 Location: Toronto, Canada iTrader: (0)	Don't guess!! 1. Use newtis to check your car's exact wiring diagram. eg. here's the link for a e93 335i https://www.newtis.info/tisv2/a/en/e...-light/lynjIv0 2. Confirm with a multimeter that the pin you think is ground, is actually ground.
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10-04-2019, 02:06 PM	#5
osunick Private 4 Rep 51 Posts Drives: 2002 Honda S2000 w/oem hardtop Join Date: Apr 2010 Location: Palo Alto, CA iTrader: (0)	Figured it out, thanks!
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