Retrofitting this mirror?

[Supervinnie40]

I read this how-to: http://www.the75andztclub.co.uk/forum/showthread.php?t=36634
And decided I want one too :P. So I found a breaker who had one and I bought it.

But my mirror looks different then the mirror from the how-to and it also had much more wiring.

Is this the wrong mirror? Does anybody know what wires go where and such?
I've got no clue how to get this working with my car.

(my car hasn't got the loom but I was going to make my own wires, just like in the how-to).

https://scontent-b-ams.xx.fbcdn.net/hphotos-frc3/t1/1897854_10152175738694817_169679205_n.jpg

https://scontent-b-ams.xx.fbcdn.net/hphotos-prn1/t1/1557547_10152175739559817_1847312947_n.jpg

https://scontent-b-ams.xx.fbcdn.net/hphotos-prn1/t1/150294_10152175740494817_2014480502_n.jpg

[Supervinnie40]

Nobody? :(

[Greeners]

It looks like the Connector has got half the other connector with it

CTB100220 is a 75/ZT or early Range Rover one....

[Greeners]

http://i.ebayimg.com/t/ROVER-75-MG-ZT-INTERIOR-AUTO-DIMMING-REAR-VIEW-MIRROR-CTB100220-/00/s/OTAwWDE2MDA=/z/Ce8AAOxy63FSqb~f/$_58.JPG

That's what it should look like

[Supervinnie40]

Well, the connector isn't very important. Since I don't have the wiring in place, I'm gonna make my own.
But in the how-to, it only shows 3 wires, this mirror has 7 wires, and I've no clue which wire should connect to what.

From the how-to I know the mirror needs a live 12v, a switched 12v and a ground. But I don't know what the other 4 wires are for and/or what they do. I don't even know if I need all of them (and if not, which ones I need or not...)

[kc13661]

Watching with interest as my mirror is the same, has to many wires compared to the 'How To'

I do have the wiring harness with mine, but obviously the plug in the A pillar only has Minimum wires and my mirror loom has many more.

[chas_1]

Im not sure but maybe you have the mirrir with a compass reading in the bottom right hand corner when connected up this would account for the extra wires maybe?

Chas

[coab]

I just fitted the compass mirror and the only wires you need are red grey and brown. The others you dont need.;)

[Supervinnie40]

Im not sure but maybe you have the mirrir with a compass reading in the bottom right hand corner when connected up this would account for the extra wires maybe?

Chas

I'm not sure how I can tell, but I can't see anything in the corners. There is no display or anything. Even when I look into the light I don't see anything.

On the top (around the center) is a little hole for the light sensor, there is also one on the back (facing the windscreen when installed).

The wires I have are:
Brown,
Green,
White with black stripe,
Grey,
Red,
White,
Black.

I searched for a way to open the case of the mirror, so I can see the circuit board, that would help a lot probably. But I haven't been able to open it....

[kc13661]

Im not sure but maybe you have the mirrir with a compass reading in the bottom right hand corner when connected up this would account for the extra wires maybe?

Chas

No these are definitely not the compass type; they are the Range Rover type mirrors.

I have looked at the How To retrofit an auto dimming mirror, and that just shows three wires from mirror, now is this a case of it only had three? or were the other wires discarded?

Not really clear on that, think I will PM the person that posted the thread.

:shrug:

[Supervinnie40]

Nobody knows which wires I (we) need?

I've got some time tomorrow and was hoping to get it done tomorrow.
But at the moment it's just sitting here, cause I don't know how to wire it up.

[Supervinnie40]

I just fitted the compass mirror and the only wires you need are red grey and brown. The others you dont need.;)

I can't find any information on what the ground should be, what wire is the live 12v etc.

[Supervinnie40]

Well, I tried some stuff, and I think I destroyed my mirror...

All I could find is that green and black are ground. All the others are +.
But when I connected some of them, the screen turned black, but didn't respond to my flashlight.
After a few second I got all small spots in the mirror.

So, still nowhere with this....
And I think I messed up my autodim mirror....

[Supervinnie40]

This is what happened:

https://scontent-b-ams.xx.fbcdn.net/hphotos-frc1/t1/1654420_10152178716009817_166645423_n.jpg
https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-prn1/t1/1557663_10152178716784817_1391224647_n.jpg
https://scontent-a-ams.xx.fbcdn.net/hphotos-prn2/t1/1781906_10152178717474817_1753435819_n.jpg

Can anybody confirm or deny that I destroyed my mirror?
The black spots do dissapear, but the 'bubbles' that you can see are still visible.

[Supervinnie40]

@KC13661,

I found the how-to to be very incomplete and unclear about the most important part (the wiring).
So after realising I ruined my mirror :mad: by trying to figure out how to wire this up, I just opened up the thing and made some pictures.

Since nobody was able to comment on the wiring or give any advice I hope this will help you. Hopefully mine didn't die in vain.

https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/t1/1901636_10152179780684817_1192637234_n.jpg

https://scontent-a-ams.xx.fbcdn.net/hphotos-frc1/l/t1/1901832_10152179781259817_1295885262_n.jpg

https://scontent-b-ams.xx.fbcdn.net/hphotos-prn1/t1/1554588_10152179827019817_587437849_n.jpg

As far as I can tell from the switch board, the wires should be like this:
RED = 12v feed
BROWN = GND (ground/earth)
GREY = RI (not sure, but I think it has something to do with reverse or switched live)
BLACK = +0 (I think this can be ignored)
WHITE = -0 (I think this can be ignored) (is also connected to GND)

Small connector:
GREEN = +0 (I think this can be ignored)
WHITE = -0 with black stripe (I think this can be ignored) (is also connected to GND)

So the way to wire this up could be:
RED = 12v
BROWN = Ground
GREY = Switched or reverse 12v

But please, don't just take my thoughts on this, ask somebody who knows for sure or wait until somebody confirms the above.
As I said, I ruined mine by trying to figure this out... is going to cost me another 30 pounds.... :( So caution is advised.
Since mine is ruined I can't test it to be sure. Mine won't go dark or lighter anymore...

What will happen:

When 12v goes to the red wire, and the brown is connected to a earth, the LCD plate behind the glass will get 1.46v.
When a light shines on the sensor in the glass, nothing happens.
When a light shines on the sensor on the back, the voltage goes down to 0.64v.
When the RI (grey) is connected to 12v, the voltage will drop to 0.64v. (shining a light on a sensor won't do anything)
When any other wire is connected the LCD plate will get 12v (which breaks it)

So, my theory would be:
When the RI (grey) gets 12v, the screen will turn light, regardless of the light that might shine on the sensor.
The sensor behind the glass doesn't do anything on mine (but it might be broken!), the sensor on the back (facing the windscreen) makes the screen go dark when a light shines on it.
The other wires aren't needed. RED = 12v (switched would be better I think), BROWN = ground, and GREY is optional if you want the mirror to become light when reversing.

[HarryM1BYT]

Hi Vinnie,

Got your PM, but I am as much in the dark as you, I can only guess and my guess is the same as yours.

The mirror is obviously now destroyed, the LCD has burnt out by the looks of it.

I would expect it to need...

A +ve, ground, reverse and one from the parking or headlights.

Reverse disables the dimming. The feed from the lights enables it to dim if the lights are on, but not in reverse.

[Supervinnie40]

Thanks Harry. Hopefully KC13661 has more luck with this then me.

[HarryM1BYT]

I've just checked Rave and that only shows three wires to the auto-mirror. That is obviously wrong, but that is all I could find on the subject.

[Supervinnie40]

I take it 'Rave' is your car?

If so, any change you could perhaps check which wires do what? i.e. which is switched, which is live, which is from reverse etc?

[Greeners]

There are a number of different mirrors and wiring schemes.

On later Range Rover / Jaguars and BMW's the interior mirror is linked to the door mirrors and they also chromatically dip as well

For this application, you only need +ve, -ve and a feed from the reversing lights to restore the visibility when reverse is selected

[pab]

The white connection block was not populated for the reverse wire, so it was left out. It just means the mirror dips in reverse.

The earth was taken directly from the courtesy light.

[Supervinnie40]

So, if I understand correctly, you didn't wire up the reverse wire?
You only took a switched 12v from the connection block at the A pilar, and the ground from the courtesy light?