YELLOW WIRE ?

[s3c chris]

Hi

Further to my previous post, I wonder if anyone knows what the function of the yellow wire in the picture is? The plug is for the rear view mirror and I am assuming the white is positive, the grey is reverse inhibit and the black is negative, no idea on the yellow.
I ask as I want to fit a Jaguar Homelink mirror and need to fit the Aston plug or at least establish the wiring.

Thank you.

[VantageHead]

I believe that auto-dimming mirrors require an electrical supply to function, as they use electrochromic technology.

Could it be this?

Should be easy to test (disconnect and see if mirror still dims when a bright light shone on it)..

[DB9S Paul]

I can't remember which wire is which but...

Ignition controlled power for dimming
Earth
Reverse Inhibit
Permanent Power so the homelink doesn't lose its memory


https://db9s.com/aston-martin-db9-dimming-rear-vie...

[s3c chris]

Hi
That’s great thank you!
By comparing the colours to the Jaguar ones, white must be switched positive, grey reverse inhibit, black earth and yellow a constant live. I will see when I fit it no doubt…..
Out of curiosity dies the Homelink work when the ignition is off?

Regards
Chris