Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-23-2021, 10:20 PM
Member
 
Join Date: Feb 2021
Location: Connecticut
Posts: 7
cessnan121pp is on a distinguished road
Question Rear Tailgate Reverse Light

Hi all, I'm trying to make good use of the EONON unit that came with my car and I'm in the process of installing a backup camera that I ran the wire for in conjunction with running the wire for my trailer brake controller.

I got to the point where I have the rear tailgate all opened up and I see 2 wires running from the center to each lighting housing. ON THE LEFT, there is a yellow and an orange wire. ON THE RIGHT, there is a green wire and an orange wire. I can't figure out which is the reverse light wire!

I tried searching extensively and I found one video that showed it was definitely one of them but the author of the video wasn't that clear.

So which is it? Which one is the reverse light wire? I originally thought the orange wire because the reverse lights would be running to both sides but I've heard it might be the yellow (which would make it green on the other side)?


Just want to know before I tap it...thanks!


Pic below where you can see yellow/orange on left and green/orange on right side.
https://www.dropbox.com/s/mwyu8krqsr...0969.HEIC?dl=0

__________________
2005 X5 3.0i 6MT
2004 Honda S2000
1993 Spec Miata
2019 Tesla Model S (the wife's)

Gone:
1995 325i 5MT
1995 M3 5MT
2006 R50 MINI 5MT
2013 X1 xDrive 28i
2015 M235i 6MT
2016 340i xDrive 6MT
Reply With Quote

Sponsored Links

  #2  
Old 06-23-2021, 10:24 PM
Overboost's Avatar
//Binary is in my DNA
 
Join Date: Apr 2006
Location: Huntersville, NC
Posts: 3,182
Overboost is on a distinguished road
The volt/ohmmeter is your friend. Just see which one has 12V in reverse. One side will be ground and the other will be a PWM 12V power.

If you are trying to power your camera from that 12V source, remember it is a 12 pulse width modulated signal and not a direct 12V. It may or may not power the camera positively.
Reply With Quote
  #3  
Old 06-23-2021, 10:37 PM
Member
 
Join Date: Apr 2019
Location: Boston, MA
Posts: 493
Effduration is on a distinguished road
I would be careful not to tap into the reverse light wiring. The previous owner did that to my X5, and I get the “check back up lights” error frequently.

What if you used the reverse light wire from the trailer wiring - inside the tailgate - as your reverse signal wire?

Then draw your 12v source from some where else…maybe even the battery.
Reply With Quote
  #4  
Old 06-23-2021, 10:46 PM
Member
 
Join Date: Feb 2021
Location: Connecticut
Posts: 7
cessnan121pp is on a distinguished road
Quote:
Originally Posted by Effduration View Post
I would be careful not to tap into the reverse light wiring. The previous owner did that to my X5, and I get the “check back up lights” error frequently.

What if you used the reverse light wire from the trailer wiring - inside the tailgate - as your reverse signal wire?

Then draw your 12v source from some where else…maybe even the battery.

So my car already thinks there's a reverse camera there when I shift into reverse. It has a CAN BUS. So I don't need the signal for anything really and I just need power to the camera. However, I only wanted the camera to be powered when the car was in reverse. I guess I have to try and tie it into the CAN BUS somehow then???
__________________
2005 X5 3.0i 6MT
2004 Honda S2000
1993 Spec Miata
2019 Tesla Model S (the wife's)

Gone:
1995 325i 5MT
1995 M3 5MT
2006 R50 MINI 5MT
2013 X1 xDrive 28i
2015 M235i 6MT
2016 340i xDrive 6MT
Reply With Quote
  #5  
Old 06-23-2021, 11:05 PM
Overboost's Avatar
//Binary is in my DNA
 
Join Date: Apr 2006
Location: Huntersville, NC
Posts: 3,182
Overboost is on a distinguished road
Some have used a relay to get the power corrected but as the above post mentioned, you may get a bulb error. There are several 12V reverse triggers up front from the LCM. One goes to the rear view mirror.
Reply With Quote
  #6  
Old 06-23-2021, 11:36 PM
Member
 
Join Date: Jan 2013
Location: TX
Posts: 74
txyaloo is on a distinguished road
Quote:
Originally Posted by cessnan121pp View Post
So my car already thinks there's a reverse camera there when I shift into reverse. It has a CAN BUS. So I don't need the signal for anything really and I just need power to the camera. However, I only wanted the camera to be powered when the car was in reverse. I guess I have to try and tie it into the CAN BUS somehow then???
I grabbed camera power from the rear wiper motor. No bulb messages that way and I can flip to the rear camera view anytime I want when towing.

Like you said, the canbus signals the radio to switch to the camera in reverse and there's no need for a separate reverse trigger wire
Reply With Quote
  #7  
Old 06-24-2021, 12:55 AM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 8,495
andrewwynn will become famous soon enough
There are 12v power at the fuse block right rear of car. I forget which are key on. You can use a relay to switch using the backup light as a signal control (maybe with RC filter to keep it 12v; you coughs direct drive with said filter also).

You can code out the light errors
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #8  
Old 06-24-2021, 02:33 AM
EODguy's Avatar
Member
 
Join Date: Jun 2018
Location: Saudi Arabia/Philippines/USA
Posts: 2,256
EODguy is on a distinguished road
1st empty relay slot on the right rear (can't remember the number) is perfect for a power tap location.

Sent from my SM-A730F using Tapatalk
__________________
"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course
Reply With Quote
  #9  
Old 06-24-2021, 05:44 AM
Member
 
Join Date: Apr 2019
Location: Boston, MA
Posts: 493
Effduration is on a distinguished road
Quote:
Originally Posted by cessnan121pp View Post
So my car already thinks there's a reverse camera there when I shift into reverse. It has a CAN BUS. So I don't need the signal for anything really and I just need power to the camera. However, I only wanted the camera to be powered when the car was in reverse. I guess I have to try and tie it into the CAN BUS somehow then???
Good Point. I am in the same boat.. I have a newer android unit in my second X5 and it knows when I am in reverse. I just don't have a camera hooked up, although the wire is back there.

If you really want power ONLY when in it's in reverse and you have both the trailer wiring and trailer module installed, maybe you can tap into the the trailer wiring. I would want to confirm that the trailer plug provides non-modulated 12v + when in reverse and not ground. I'd also want to make sure that the trailer electronics are active even if a trailer is not plugged into the 7-pin connector near the hitch.
Reply With Quote
Reply

Bookmarks

Tags
backup camera, reverse light wire, tailgate

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 03:45 AM.
vBulletin, Copyright 2021, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.