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Upgrading to Auto-Dimming Rearview on 991.2

 
Old 05-03-2019, 07:21 AM
  #16  
Yashwant
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Hello,
I was wondering how did you get the auto dimming rear view working.
I am stuck. I thought I could do away without the LIN cable connected but it is not the case.
I have hardwired the mirror from the fuse box.
It is powered,the green light below is on but the mirror does not auto-dim.
Would really appreciate your help?

Take care.
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Old 05-03-2019, 11:08 AM
  #17  
RYE
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Yes, bummer. Without LIN input and thereby the mirror knowing when the headlights are switched on or not, I don't believe you will get it to work.
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Old 05-03-2019, 12:00 PM
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Yashwant
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Thank you for your reply.
Has anyone been able to bypass the Local Interconnect Network?
I have the seen the rain/ headlight sensor has 3 pins as well. Guess the middle wire is for the LIN. Could I tap this one?

Cheers
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Old 05-03-2019, 03:32 PM
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Originally Posted by Yashwant View Post
Thank you for your reply.
Has anyone been able to bypass the Local Interconnect Network?
I have the seen the rain/ headlight sensor has 3 pins as well. Guess the middle wire is for the LIN. Could I tap this one?

Cheers
sure, you should be able to tap into LIN bus but if your system is not sending the LIN commands to address the mirror nothing will happen.
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Old 05-04-2019, 12:07 AM
  #20  
RYE
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I think it could work. The mirror will listen for a lights on command. Modules that react to commands don't have to be specifically addressed.
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Old 05-07-2019, 03:27 AM
  #21  
Yashwant
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Hello, I am a bit confused. It would be great if you could share the wiring schematic for the 718

From the mirror I have BRN, RED, BLU



From the rain/light sensor I have BLK/RED, BLK, VIO


Thank you for your help.
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Old 05-07-2019, 08:43 AM
  #22  
RYE
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Originally Posted by Yashwant
Hello, I am a bit confused. It would be great if you could share the wiring schematic for the 718

From the mirror I have BRN, RED, BLU



From the rain/light sensor I have BLK/RED, BLK, VIO


Thank you for your help.
Those are the standard colors from the car and mirror - same as on my car. Just connect the mirror and you are good to go.
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Old 05-07-2019, 08:46 AM
  #23  
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Black is ground
Black/red is switch 12V
Purple is LIN
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Old 05-07-2019, 12:52 PM
  #24  
Yashwant
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Originally Posted by RYE View Post
Black is ground
Black/red is switch 12V
Purple is LIN
Dear Rye,

Thank you for your prompt reply.

I have hardwired the mirror from the fusebox, could you please confirm for the mirror: BRN, RED, BLU?
Switch 12V
Ground
LIN

Cheers
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Old 05-07-2019, 01:41 PM
  #25  
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Originally Posted by Yashwant View Post
Dear Rye,

Thank you for your prompt reply.

I have hardwired the mirror from the fusebox, could you please confirm for the mirror: BRN, RED, BLU?
Switch 12V
Ground
LIN

Cheers
I am traveling and not near my car. However, the middle wire in LIN. It matches the wiring diagram I previously posted. You had previously already wired 12V and ground?
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Old 06-05-2019, 09:13 PM
  #26  
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I tried doing this and it didn't work. For one, the wiring harness (991-612-691-00) is for the rain sensor, so don't waste your money on it. What you need is the yellow plug, which unfortunately is part of the main wiring harness. So what I did was tap 12v and ground, which powered the mirror, but tapping into the LIN cable didn't do anything. I suspect that you need to have the computer programmed for it to function. Anyone else have any luck?
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